text: lst_1=[1,2,4,88]
  lst_2=[1,3,4,95,120]
  lst_3=[]
  i=0
  j=0
  for k in range(len(lst_1)+len(lst_2)):
      if (lst_1[i]<= (lst_2[j])):      
          lst_3.append(lst_1[i])        
          if (i>=len(lst_1)-1):
              if j<=(len(lst_2)-1):
                  lst_3.append(lst_2[j])
                  if j<len(lst_2)-1:
                      j+=1
                  else:
                      break
              else:
                      break
          else:
              i+=1    
      else:
          if j<len(lst_2)-1:
              lst_3.append(lst_2[j])
              j+=1
          else:
              break
  print(lst_3)
  i = j = 0
  for index in range(len(lst_1)):
      if lst_1[i] == lst_2[j]:
          lst_3.append([lst_1[i],lst_2[j]])
          i = i + 1
          j = j + 1
      elif lst_1[i] > lst_2[j]:
          lst_3.append(lst_2[j])
          j= j + 1
      elif lst_2[j] > lst_1[i]:
          lst_3.append(lst_1[i])
          i = i + 1
      
          