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: ['8437', '8393', '6015', 't', 'h', '9513', '147', 'P', 'A', '4125', 't', '8219', 'k', 'w', '5941', 'S', '635', '1857', 'q', 'c', '7183', '13', '1295', 'S', '6583', 'g']

8437, 8393, 6015, 20, 8, 9513, 147, 16, 1, 4125, 20, 8219, 11, 23, 5941, 19, 635, 1857, 17, 3, 7183, 13, 1295, 19, 6583, 7