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: ['2831', '605', 'm', '8773', 'b', '6981', 'h', 'G', '6215', '7277', 'Q', 'B', 'y', 'u', 'S', '1169', '4471', '8099', '525', '697']

2831, 605, 13, 8773, 2, 6981, 8, 7, 6215, 7277, 17, 2, 25, 21, 19, 1169, 4471, 8099, 525, 697