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: ['M', 'e', 'H', 'D', 'U', 'h', '1541', 'b', '4911', 'N', '4943', '913', 'y', 'v', 'J', 'h', '6385', '8653', 'x', '1953', '5105', '4309', '9021', '2249', 'F', '1245', 'l', 'q', 'F', 'a', 'q', '9941', 'h', 'W', 'g', '4153', '6957', 'c', '1187', 'k']

13, 5, 8, 4, 21, 8, 1541, 2, 4911, 14, 4943, 913, 25, 22, 10, 8, 6385, 8653, 24, 1953, 5105, 4309, 9021, 2249, 6, 1245, 12, 17, 6, 1, 17, 9941, 8, 23, 7, 4153, 6957, 3, 1187, 11