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: ['1', '5635', '275', '2841', '7097', '1777', '4107', 'B', 'Z', '8847', '5511', '5257', 't', '7631', 'D', '1833', '9623', 'F', 'M', '8233', 'J', 'Z', '5481', '6515', '7355', '6653']

1, 5635, 275, 2841, 7097, 1777, 4107, 2, 26, 8847, 5511, 5257, 20, 7631, 4, 1833, 9623, 6, 13, 8233, 10, 26, 5481, 6515, 7355, 6653