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: ['733', 'U', '175', '2323', 't', '1483', '8537', '1971', '8823', 'i', '6291', '5499', '7345', '3651', '467', '5757', 'K', 'A', '3611', 'b', 'o', '8259', '751', '7017', 'H', 'B', '9935', 'p']

733, 21, 175, 2323, 20, 1483, 8537, 1971, 8823, 9, 6291, 5499, 7345, 3651, 467, 5757, 11, 1, 3611, 2, 15, 8259, 751, 7017, 8, 2, 9935, 16