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: ['2601', 'W', 'B', 'I', 't', 'X', '5773', '7199', '5505', 'T', '689', '1159', 'W', 'G', '1247', '3461']

2601, 23, 2, 9, 20, 24, 5773, 7199, 5505, 20, 689, 1159, 23, 7, 1247, 3461