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: ['j', 'h', '5443', '7299', '1333', 'F', '7173', 'Y', 'g', 'N', '1869', '5031', '5193', '4729', '8187', '2235', 'S', '1685', '2213', 'u', 'a', 'M', 'D', '8395', 'X', 'R', '8721']

10, 8, 5443, 7299, 1333, 6, 7173, 25, 7, 14, 1869, 5031, 5193, 4729, 8187, 2235, 19, 1685, 2213, 21, 1, 13, 4, 8395, 24, 18, 8721