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: ['1013', '2003', 'j', '7215', '8495', 'Y', 'G', 'X', '5441', 'C', 'O', '4187', '2159', 'q', '7997', '1627', 'v', 'z', '1263', '2053', 'D', '1493', '3605', '2189', '3567', 'c', 'r', 'e', 'd', '5941', 'n', '3529', 'L', 'u', '4895']

1013, 2003, 10, 7215, 8495, 25, 7, 24, 5441, 3, 15, 4187, 2159, 17, 7997, 1627, 22, 26, 1263, 2053, 4, 1493, 3605, 2189, 3567, 3, 18, 5, 4, 5941, 14, 3529, 12, 21, 4895