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: ['n', '2963', 'P', 'u', 'y', 'v', 'x', 'Z', 's', 'F', '3347', 'h', 'U', '3981', 'y', 'D', 'J', 'x', 'n', 'd', 'U', '113', 'N', '1801', '3973', '2155', '161', '443', '7707', '8301']

14, 2963, 16, 21, 25, 22, 24, 26, 19, 6, 3347, 8, 21, 3981, 25, 4, 10, 24, 14, 4, 21, 113, 14, 1801, 3973, 2155, 161, 443, 7707, 8301