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: ['3981', 'f', 'W', '111', 'm', 'w', 'r', 'm', 'g', '7089', 'a', 'W', '4929', '881', '4029', '4729', '4333', '8925', 'G']

3981, 6, 23, 111, 13, 23, 18, 13, 7, 7089, 1, 23, 4929, 881, 4029, 4729, 4333, 8925, 7