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: ['A', '7533', 'S', '99', '2651', 'i', 'v', '1065', 'V', 'q', '5697', 'y', '4907', 'h', 'd', 'V', 'Z', '6489', '1835', '4441', '2875', 'a', 'l', '5721', '6957', '4791', 'h', 'b', 'x', 'e', '6489', 'P', '9845', '717', 'l', 'i', 'l', 'h', 'Y']

1, 7533, 19, 99, 2651, 9, 22, 1065, 22, 17, 5697, 25, 4907, 8, 4, 22, 26, 6489, 1835, 4441, 2875, 1, 12, 5721, 6957, 4791, 8, 2, 24, 5, 6489, 16, 9845, 717, 12, 9, 12, 8, 25