# Write a Python program to Extract Indices of substring matches # Python3 code to demonstrate working of # Extract Indices of substring matches# Using loop + enumerate()  # initializing listtest_list = ["Gfg is good", "for Geeks", "I love Gfg", "Its useful"]  # initializing K K = "Gfg"  # printing original listprint("The original list : " + str(test_list))  # using loop to iterate through list res = []for idx, ele in enumerate(test_list):  if K in ele:    res.append(idx)  # printing result print("The indices list : " + str(res))