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: ['g', 'n', '9541', 'T', 'q', '2969', '6541', 'W', '3141', '1947', 'V', 'x', 'l', 'C', '2065', '9357', 'g', '9789', 'D', '3553', '599', 'b', 'h']

7, 14, 9541, 20, 17, 2969, 6541, 23, 3141, 1947, 22, 24, 12, 3, 2065, 9357, 7, 9789, 4, 3553, 599, 2, 8