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: ['Z', 'a', 'E', '5235', '8257', 'g', 'h', 'c', 'p', '3171', '8531', '9187', '9545', 'e', 'u', '1969', 'T', '7669', '9857', 'F', '877', 'Z', '3409', '5239', '2307', 'n', '7007', '8191', 'E', '4011', '8193', 'C', 'r', 'p', 'E']

26, 1, 5, 5235, 8257, 7, 8, 3, 16, 3171, 8531, 9187, 9545, 5, 21, 1969, 20, 7669, 9857, 6, 877, 26, 3409, 5239, 2307, 14, 7007, 8191, 5, 4011, 8193, 3, 18, 16, 5