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: ['o', 'l', 'T', 'Z', 'N', 'U', '5795', 'Q', '2525', 'u', 'x', '355']

15, 12, 20, 26, 14, 21, 5795, 17, 2525, 21, 24, 355