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', '3373', '171', '3711', '6231', '8499', '8713', '5709', 'g', '2709', '691', '9363', 'h', 'f', '3195', '3969', '2605', '7477']

10, 3373, 171, 3711, 6231, 8499, 8713, 5709, 7, 2709, 691, 9363, 8, 6, 3195, 3969, 2605, 7477