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: ['A', '8171', '6587', '5831', '3797', '2981', '8093', '4299', 'Y', '3017', 'k', 'D', 'B', 'R', '9441']

1, 8171, 6587, 5831, 3797, 2981, 8093, 4299, 25, 3017, 11, 4, 2, 18, 9441