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: ['B', 'F', '9343', '7895', '2747', '6495', '6641', '7067', 'u', '8541', 'N', '1603', '8257', '7469', 'P', '9617', '5191', 'e', '525', '4093', 'G', '2467', 'F', '1247', '8139', '9521', 'i', 'B', 'Z', '31', '3733', '6399', '4025', '87', 'x', '77']

2, 6, 9343, 7895, 2747, 6495, 6641, 7067, 21, 8541, 14, 1603, 8257, 7469, 16, 9617, 5191, 5, 525, 4093, 7, 2467, 6, 1247, 8139, 9521, 9, 2, 26, 31, 3733, 6399, 4025, 87, 24, 77