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: ['9307', 't', '7521', '1787', 'K', 'R', 'S', 'q', 'Q', '9679', '6415', 'V', '9593', 'X', 'U', '707', '3367', 'J', 'H', 'Q', '9889', 'w', 'd', '7075', 'L', 'F', 'j', 't', 'W', 'r', '4743', '2469', 'D', 's', '4687', 'n']

9307, 20, 7521, 1787, 11, 18, 19, 17, 17, 9679, 6415, 22, 9593, 24, 21, 707, 3367, 10, 8, 17, 9889, 23, 4, 7075, 12, 6, 10, 20, 23, 18, 4743, 2469, 4, 19, 4687, 14