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: ['U', '8537', 'X', '6075', 'Q', 'i', 'Q', '9165', 'r', 't', '7435', '5677', '7079', '2105', '5375', '6687', '7065', 'l', 'I', 'd', 'Q', '9967', 'j', '4795', 'h', 'k']

21, 8537, 24, 6075, 17, 9, 17, 9165, 18, 20, 7435, 5677, 7079, 2105, 5375, 6687, 7065, 12, 9, 4, 17, 9967, 10, 4795, 8, 11