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: ['1525', '5621', '9851', 'q', 'Q', '1185', 'j', '5441', 'b', '7723', '3859', '3061', '485', '4497', '3725', '4283', 'm', '8691', 'Q', 'O', '9749']

1525, 5621, 9851, 17, 17, 1185, 10, 5441, 2, 7723, 3859, 3061, 485, 4497, 3725, 4283, 13, 8691, 17, 15, 9749