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: ['3025', 'P', '7975', '9011', 'q', '1147', '4751', '5849', '8729', '7469', '3821', '4083', '3875', '531', 'l', '9061', '5023', 'U', '6835', '229', 'E', '8637']

3025, 16, 7975, 9011, 17, 1147, 4751, 5849, 8729, 7469, 3821, 4083, 3875, 531, 12, 9061, 5023, 21, 6835, 229, 5, 8637