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: ['b', '9349', '7171', '2397', 'a', '7763', 'r', '9119', '5217', '8459', '161', '6223', 'k', '4247', 'S', 'n', '889', 'x']

2, 9349, 7171, 2397, 1, 7763, 18, 9119, 5217, 8459, 161, 6223, 11, 4247, 19, 14, 889, 24