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', 'q', '4927', 'o', 'I', '5845', '351', '3951', '8119', '9821', 'M', 's', 'V', 'U', 'x', '2497', 'V', '3545', '9271', '1555', 'Z', '4971', 'z', 'S', 'T', '5257', 'E', '5521', 'Y', 'h']

1, 17, 4927, 15, 9, 5845, 351, 3951, 8119, 9821, 13, 19, 22, 21, 24, 2497, 22, 3545, 9271, 1555, 26, 4971, 26, 19, 20, 5257, 5, 5521, 25, 8