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: ['M', 'C', 'T', 'i', '7051', 'Z', '7865', '8625', 'O', '9603', 'E', 'I', '1199', 'w', 'u', 'F', 'P', '3321', 'g', '6843', '6369', 'O', 'O', 'v', '7447', '5707', 'l', 'F', 'w', 'O', 'x', '3651']

13, 3, 20, 9, 7051, 26, 7865, 8625, 15, 9603, 5, 9, 1199, 23, 21, 6, 16, 3321, 7, 6843, 6369, 15, 15, 22, 7447, 5707, 12, 6, 23, 15, 24, 3651