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: ['F', '1765', '267', 'F', 's', '3331', '7465', '1121']

6, 1765, 267, 6, 19, 3331, 7465, 1121