# Write a Python program to find all the Combinations in the list with the given condition 
 # Python3 code to demonstrate working of 
# Optional Elements Combinations
# Using loop
  
# initializing list
test_list = ["geekforgeeks", [5, 4, 3, 4], "is", 
             ["best", "good", "better", "average"]]
  
# printing original list
print("The original list is : " + str(test_list))
  
# initializing size of inner Optional list 
K = 4
  
res = []
cnt = 0
while cnt <= K - 1:
    temp = []
      
    # inner elements selections
    for idx in test_list:
          
        # checks for type of Elements
        if not isinstance(idx, list):
            temp.append(idx)
        else:
            temp.append(idx[cnt])
    cnt += 1
    res.append(temp)
  
# printing result 
print("All index Combinations : " + str(res))