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: ['v', 'Y', 'm', 'Y', 'h', 'Y', 'X', '137', '2049', '5419', 'E', 'W', 'U', '1733', 'K', 'd', '5061', 'I', '6935', 'v', '9847', 'R', 'Z', 'U', 'y', '9765', 'z', 'm', 'p', '6771', 'V', 'D', 'a', 'B', '5437', '1447', 'v', 'R', 'U']

22, 25, 13, 25, 8, 25, 24, 137, 2049, 5419, 5, 23, 21, 1733, 11, 4, 5061, 9, 6935, 22, 9847, 18, 26, 21, 25, 9765, 26, 13, 16, 6771, 22, 4, 1, 2, 5437, 1447, 22, 18, 21