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: ['J', 'T', '1709', 'm', '9225', '1801', '7651', '831', 'm', 'b']

10, 20, 1709, 13, 9225, 1801, 7651, 831, 13, 2