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: ['S', 'f', 'i', '929', 'l', 'h', 'N']

19, 6, 9, 929, 12, 8, 14