text: #! python3
  
  from collections import defaultdict
  import sys
   
  class Heap():
   
      def __init__(self):
          self.array = []
          self.size = 0
          self.pos = []
   
      def newMinHeapNode(self, v, dist):
          minHeapNode = [v, dist]
          return minHeapNode
   
      def swapMinHeapNode(self,a, b):
          t = self.array[a]
          self.array[a] = self.array[b]
          self.array[b] = t
   
      def minHeapify(self, idx):
          smallest = idx
          left = int(2*idx + 1)
          right = int(2*idx + 2)
   
          if left < self.size and self.array[left][1] < self.array[smallest][1]:
              smallest = left
   
          if right < self.size and self.array[right][1] < self.array[smallest][1]:
              smallest = right
   
          if smallest != idx:
   
              self.pos[ self.array[smallest][0] ] = idx
              self.pos[ self.array[idx][0] ] = smallest
   
              self.swapMinHeapNode(smallest, idx)
   
              self.minHeapify(smallest)
   
     
      def extractMin(self):
   
          if self.isEmpty() == True:
              return
   
          root = self.array[0]
  
          lastNode = self.array[self.size - 1]
          self.array[0] = lastNode
   
          self.pos[lastNode[0]] = 0
          self.pos[root[0]] = self.size - 1
   
          self.size -= 1
          self.minHeapify(0)
   
          return root
   
      def isEmpty(self):
          return True if self.size == 0 else False
   
      def decreaseKey(self, v, dist):
   
          i = self.pos[v]
   
          self.array[i][1] = dist
   
          while i > 0 and self.array[i][1] < self.array[int((i - 1) / 2)][1]:
  
              self.pos[ self.array[i][0] ] = int((i-1)/2)
              self.pos[ self.array[int((i-1)/2)][0] ] = i
              self.swapMinHeapNode(i, int((i - 1)/2) )
   
              i = int((i - 1) / 2);
   
      def isInMinHeap(self, v):
   
          if self.pos[v] < self.size:
              return True
          return False
   
   
  class Graph():
   
      def __init__(self, V):
          self.V = V
          self.graph = defaultdict(list)
   
      def printPath(self, parent, j):
          if parent[j] == -1 :
              return
          self.printPath(parent , parent[j])
          print (" -> %s" % (""+Stations[j]), end=" ")
  
      def printSolution(self, dist, parent):
          src = sn
          print("Total distance to be traveled: %d KM\n" % (dist[dn]));
          print(Stations[src],end="")
          self.printPath(parent,dn)
  
      def addEdge(self, src, dest, weight):
   
          newNode = [dest, weight]
          self.graph[src].insert(0, newNode)
   
          newNode = [src, weight]
          self.graph[dest].insert(0, newNode)
   
      def dijkstra(self, src):
  	
          V = self.V  
          dist = []   
                     
          parent = [-1]*112
          minHeap = Heap()
   
          for v in range(V):
              dist.append(sys.maxsize)
              minHeap.array.append( minHeap.newMinHeapNode(v, dist[v]) )
              minHeap.pos.append(v)
   
          minHeap.pos[src] = src
          dist[src] = 0
          minHeap.decreaseKey(src, dist[src])
   
          minHeap.size = V;
   
          while minHeap.isEmpty() == False:
   
              newHeapNode = minHeap.extractMin()
              u = newHeapNode[0]
   
              for pCrawl in self.graph[u]:
   
                  v = pCrawl[0]
   
                  if minHeap.isInMinHeap(v) and dist[u] != sys.maxsize and pCrawl[1] + dist[u] < dist[v]:
                          dist[v] = pCrawl[1] + dist[u]
                          parent[v] = u
   
                          minHeap.decreaseKey(v, dist[v])
   
          self.printSolution(dist, parent)
        
  
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  [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,7,0,11,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
  [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,11,0,4,0,0,0,0,0,0,0,0,0,0,0,0,0],
  [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4,0,4,0,0,0,0,0,0,0,0,0,0,0,0],
  [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4,0,7,0,0,0,0,0,0,0,0,0,0,0],
  [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,7,0,7,0,0,0,0,0,0,0,0,0,0],
  [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,7,0,3,0,0,0,0,0,0,0,0,0],
  [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,0,5,0,0,0,0,0,0,0,0],
  [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,5,0,1,0,0,0,0,0,0,0],
  [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,0,3,0,0,0,0,0,0],
  [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,0,3,0,0,0,0,0],
  [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,0,0,0,0,0,0],
  [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,8,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,0,0,0],
  [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,0,3,0,0],
  [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,0,3,0],
  [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,0,4],
  [0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,3,5,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,4,0]];
  
  
  Stations=["Churchgate","Marine Lines","Charni Road","Grant Road","Mumbai Central","Mahalaxmi","Lower Parel","Elphistone Road","Dadar",
  "Matunga(W)","Mahim","Bandra","Khar Road","Santacruz","Vile Parle","Andheri","Jogeshwari","Ram Mandir","Gorgaon","Malad","Kandivali",
  "Borivali","Dahisar","Mira Road","Bhayandar","Naigaon","Vasai Road","NallaSopara","Virar","Vaitarna","Saphale","Kelve Road","Palghar",
  "Umroli","Boisar","Vangaon","Dahanu Road","CST","Masjit Bander","Sandhurst Road","Dockyard Road","Reay Road","Cotton Green",
  "Sewri","Vadala","King's Circle","GTB Nagar","Chuna Bhatti","Kurla","Tilak Nagar","Chembur","Govandi","Mankhurd","Vashi","Sanpada",
  "Jui Nagar","Nerul","Seawood Darave","Belapur","Kharghar","Manasarovar","Khandeshwar","Panvel","Byculla","Chinchpokali","Currey Rd",
  "Parel","Matunga (E)","Sion","Vidya Vihar","Ghatkopar","Vikhroli","Kanjur Marg","Bhandup","Nahur","Mulund","Thane","Kalwa","Mumbra",
  "Diva","Kopar","Dombivali","Thakurli","Kalyan","Shahad","Ambivali","Titwala","Khadavali","Vashind","Asangaon","Atgaon","Khardi",
  "Kasara","Vitthalvadi","Ulhasnagar","Ambernath","Badlapur","Vangani","Shelu","Neral","Bhivpuri Road","Karjat","Palasdhari",
  "Kelavali","Dolavali","Lowjee","Khopoli","Airoli","Rabale","Ghansoli","Kopar Khairane","Turbhe"]
   
  
  graph = Graph(112)
  
  for i in range(112):
  	for j in range(i,112):
  		if(a[i][j]!=0):
  			graph.addEdge(i, j, a[i][j])
  
  
  for i in range(22):
          print("*", end="")
  
  print("");
  
  for i in range(7):
          print("*", end="")
  
  print("WELCOME", end="")
  
  for i in range(8):
          print("*", end="")
  
  print("");
  
  for i in range(10):
          print("*", end="")
  
  print("TO",end="");
  
  for i in range(10):
          print("*", end="")
  
  print("")
  
  for i in range(5):
          print("*", end="")
  
  print("LOCAL ROUTER",end="");
  
  for i in range(5):
          print("*", end="")
  
  print("");
  
  for i in range(22):
          print("*", end="")
  
  print("");
  
  
  source=input("\nEnter first two letters of your source station: ");
  j=1;
  sra=[0]*112
  k=0;
  for i in Stations:
  	s=i
  	if(source.lower()==(""+(s[:2])).lower()):
  		sra[j]=k		
  		print("%d. %s" % (j, ""+i))
  		j=j+1
  	k+=1
  
  sn=sra[int(input("Enter your source station number: "))]
  
  dest=input("\nEnter first two letters of your destination station: ");
  
  j=1;
  k=0
  dra=[0]*112
  for i in Stations:
  	s=i
  	if(dest.lower()==(""+(s[:2])).lower()):
  		print("%d. %s" % (j, ""+i))
  		dra[j]=k
  		j=j+1
  	k+=1
  
  dn=dra[int(input("Enter your destination station number: "))]
  
  graph.dijkstra(sn)
  
  print("\n");
  