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: ['9621', 'z', 'r', 'F', '2115', '8887', '4059', '4945', 'L', 'I', 'C', '2685', 'T', '4421', 'Z', '8603', '1689', '7849', '9775', '3327', '9887', '2825', '5405', 'C', 'Z', 'T', 't']

9621, 26, 18, 6, 2115, 8887, 4059, 4945, 12, 9, 3, 2685, 20, 4421, 26, 8603, 1689, 7849, 9775, 3327, 9887, 2825, 5405, 3, 26, 20, 20