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: ['q', 'y', 'y', 'l', 'h', '6347', '7445', 'r', '3511', '8433', 't', '9123', 'L', 'C', 'i', '4441', '2765', 'w', 'f', 'C', 'R', 'B']

17, 25, 25, 12, 8, 6347, 7445, 18, 3511, 8433, 20, 9123, 12, 3, 9, 4441, 2765, 23, 6, 3, 18, 2