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: ['u', 'z', '4329', '4959', 'Z', 'V', '1227', '2001', 'C', 'R', 'E', '2645', '1663', '6131', 'M', '2063', '3593', 'q', 'D', '3513', 'g', 'n', 'A', 'R', '6047', 'R', 'X', 'c', 'g', '4859', 'i', 'v', '4977', '2535', 'K', '4799', 'X', '5513']

21, 26, 4329, 4959, 26, 22, 1227, 2001, 3, 18, 5, 2645, 1663, 6131, 13, 2063, 3593, 17, 4, 3513, 7, 14, 1, 18, 6047, 18, 24, 3, 7, 4859, 9, 22, 4977, 2535, 11, 4799, 24, 5513