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: ['q', '7753', 'x', 's', '9531', '8659', 'P', '5303', 'i', 'Y', 'u', '369', '4623', '2241', '2813', 'U', 'H', 'Q', 'y', '1027', 'A', 'Q', '7863', '4659', '9909', 'l', 's', 'g', '4507', '537', '7755', 'G', '265', '7913', '5641', 'z', 't']

17, 7753, 24, 19, 9531, 8659, 16, 5303, 9, 25, 21, 369, 4623, 2241, 2813, 21, 8, 17, 25, 1027, 1, 17, 7863, 4659, 9909, 12, 19, 7, 4507, 537, 7755, 7, 265, 7913, 5641, 26, 20