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: ['y', 'g', 'Q', 'Z', '267', '1963', '2307', 'r', '3251', '6823', '1131', '1859', '7737', 'j', '529']

25, 7, 17, 26, 267, 1963, 2307, 18, 3251, 6823, 1131, 1859, 7737, 10, 529