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: ['1801', 'Y', '8017', '3223', '7985', '7953', '1871', '2023', 's', '8037', 'm', '3991', '2605']

1801, 25, 8017, 3223, 7985, 7953, 1871, 2023, 19, 8037, 13, 3991, 2605