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: ['c', 's', 'j', 't', '3651', 'r', 'g', '4891', '3487', 'c', 'I', 'I', '2937', '3601', '5855', 'q', 'E', 'X', 'H', '5125', 'A', '125', 'z', 'x', '5813', 'K', '8505', '3581', 'N', 'R']

3, 19, 10, 20, 3651, 18, 7, 4891, 3487, 3, 9, 9, 2937, 3601, 5855, 17, 5, 24, 8, 5125, 1, 125, 26, 24, 5813, 11, 8505, 3581, 14, 18