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: ['3451', '5559', 'A', '1893', 'p', '6153', 't', 'g', '2329', '249', 'o', '8059', '7945', 'Q']

3451, 5559, 1, 1893, 16, 6153, 20, 7, 2329, 249, 15, 8059, 7945, 17