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: ['3723', '9019', '1475', '229', '2961', '2131', 'B', '2245', 'o', '2299', 'R', '8165', 'v', 'Q', '501', 'L', '6203', 'y', 'r', 'u', '327', '617', 'z', '3843', 'D', '5647', 'Y', 'f', '4809']

3723, 9019, 1475, 229, 2961, 2131, 2, 2245, 15, 2299, 18, 8165, 22, 17, 501, 12, 6203, 25, 18, 21, 327, 617, 26, 3843, 4, 5647, 25, 6, 4809