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: ['1743', 'x', '5983', '1093', 't', 'm', '3627', '5231', 'a']

1743, 24, 5983, 1093, 20, 13, 3627, 5231, 1