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: ['2623', 'Y', '9961', 'A', 'z', 'I', '9531', 'm', '51', 'G', '5927', 'v', '7587', 'E', '4229', 'X', 'R', '561', 't', 'o', 'q', 'Z', '1791', '5755', 'l', 'F', 'u', 'h', 'M']

2623, 25, 9961, 1, 26, 9, 9531, 13, 51, 7, 5927, 22, 7587, 5, 4229, 24, 18, 561, 20, 15, 17, 26, 1791, 5755, 12, 6, 21, 8, 13