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: ['r', 'b', 'O', '5523', '4843', 'F', '6193', 'O', 'Y', 'U', 'j', '5585', 'W', 't', 'h', '4863', '4667', 'g', '4821', '8391', 'r', 's', 'M', '511', 'h', '3373', '1015', '7343', 'n', '2031', 'Y', 'L', 'B', '8041', '2287']

18, 2, 15, 5523, 4843, 6, 6193, 15, 25, 21, 10, 5585, 23, 20, 8, 4863, 4667, 7, 4821, 8391, 18, 19, 13, 511, 8, 3373, 1015, 7343, 14, 2031, 25, 12, 2, 8041, 2287