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: ['1533', '8627', '2455', 'W', 'Q', 'v', 'Y', 'F', '135']

1533, 8627, 2455, 23, 17, 22, 25, 6, 135