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: ['6483', 'i', 'P', '6139', '5673', '4813', '3607', 'j', 'e', '9191', 'P', 'X', 'B', 'e', 'z', 's', '5865', '1181', 't', 'U', '3689', '4113', 'h', '817', 'V', '7367', '1927', '957', 'f', '6841', 'k', 'L', 'i', 's', '4531', '9847']

6483, 9, 16, 6139, 5673, 4813, 3607, 10, 5, 9191, 16, 24, 2, 5, 26, 19, 5865, 1181, 20, 21, 3689, 4113, 8, 817, 22, 7367, 1927, 957, 6, 6841, 11, 12, 9, 19, 4531, 9847