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: ['9495', 'p', 'B', '7119', '287', '7743', '43', 'H', 'i', '985', '5295', 'W', '1669', 'n', '579', '397', '2497', '9513', '3667', '6259', 'J', '5469', '3307', 'z', '835', 'Y', 'H', '3187', 'N', 'n', 'n', 'G', 'M', '2969', '8849', '1001', 't', '5919']

9495, 16, 2, 7119, 287, 7743, 43, 8, 9, 985, 5295, 23, 1669, 14, 579, 397, 2497, 9513, 3667, 6259, 10, 5469, 3307, 26, 835, 25, 8, 3187, 14, 14, 14, 7, 13, 2969, 8849, 1001, 20, 5919