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: ['7087', '2853', 'h', 'h', '565', '8791', 'y', 'l', 'v', '825', '7003', '6443', 'k', '2213', '6705', 'm', 'm', '9421', 'n', '6543', 'f', 'T']

7087, 2853, 8, 8, 565, 8791, 25, 12, 22, 825, 7003, 6443, 11, 2213, 6705, 13, 13, 9421, 14, 6543, 6, 20