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: ['P', '3767', '6357', '2415', '4261', 'I', '6563', 'R', 'h', '3299', '4641', '3189', '5625', '8573', 'l', '3321', 'i', 'O', 'K', 'l', 'J', 'y', 'x', 'e', 'l', '8495', 'z', 'm', '1557', 'R', 'l', 'P', '1953', '4497', '535', 'D', 'V', 't']

16, 3767, 6357, 2415, 4261, 9, 6563, 18, 8, 3299, 4641, 3189, 5625, 8573, 12, 3321, 9, 15, 11, 12, 10, 25, 24, 5, 12, 8495, 26, 13, 1557, 18, 12, 16, 1953, 4497, 535, 4, 22, 20