Definition: In this task, you are given an input list A. You need to convert all the alphabets in the list with a number representing their position in the English alphabet. E.g., replace A by 1, B by 2, a by 1, b by 2, and so on.
Input: ['N', '4351', '4461', '8397', 'X', '6627', '6187', '8745', 'i', 'g', '8649', 'f', '8915', 'k', '2327', '8647', 'c']

14, 4351, 4461, 8397, 24, 6627, 6187, 8745, 9, 7, 8649, 6, 8915, 11, 2327, 8647, 3