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: ['c', 'E', 'M', '2213', '7995', '7873', 'K', '9131', '7783', '8471', '7711', '3145', '7561', 'J', '7601', '31', '5349', '411', '5779']

3, 5, 13, 2213, 7995, 7873, 11, 9131, 7783, 8471, 7711, 3145, 7561, 10, 7601, 31, 5349, 411, 5779