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: ['2675', 'C', 'S', 'N', '8179', 'h', '7803', '6801', '4821', 'u', 'T', 'T', '599', 'G', 'Q', 'X', 'x', 'Q', '1125', 'j', '9489', '4489', '565', 'P', 'R']

2675, 3, 19, 14, 8179, 8, 7803, 6801, 4821, 21, 20, 20, 599, 7, 17, 24, 24, 17, 1125, 10, 9489, 4489, 565, 16, 18