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: ['5069', 'N', '3685', '8623', 'B', 's', 'z', '5423', 't', 'Q', 'm']

5069, 14, 3685, 8623, 2, 19, 26, 5423, 20, 17, 13