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: ['4537', '7077', 'A', '1835', 't', 'N', '8375', '6539', '3275', '4351', 'I', 'N', '8693', '1795', '9073', '1853', '7411', '4099', '7951', '3795', '9345', 's', '7063', '3667', '5995', 'Z', '2739', 'e', '4551', '9183', 'H', '2881']

4537, 7077, 1, 1835, 20, 14, 8375, 6539, 3275, 4351, 9, 14, 8693, 1795, 9073, 1853, 7411, 4099, 7951, 3795, 9345, 19, 7063, 3667, 5995, 26, 2739, 5, 4551, 9183, 8, 2881