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: ['1213', 'n', 'p', '9323', 'Y', '5629', '9973', '5089', '5309', 'D', '969', '1221', 'g', 'A', '2559', 'v', '2299', 'D', 'G', 'U', '3185', '8147', '9701', '8747', '3179', '3551', 'z', 'n', 'V', 'E', 'm']

1213, 14, 16, 9323, 25, 5629, 9973, 5089, 5309, 4, 969, 1221, 7, 1, 2559, 22, 2299, 4, 7, 21, 3185, 8147, 9701, 8747, 3179, 3551, 26, 14, 22, 5, 13