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: ['C', 'I', '4677', '4847', '9163', 'J', 'a', '5311', 'L', 'c', 'm', '7097', 'K', 'K', 'T', 'Z', 'U', '321', '5927', 'Y', 'O', '861', 'T', 'P', 'D', 'L', '2761', '4959', 'b', '9613', '579', '2807', 'H', '3157']

3, 9, 4677, 4847, 9163, 10, 1, 5311, 12, 3, 13, 7097, 11, 11, 20, 26, 21, 321, 5927, 25, 15, 861, 20, 16, 4, 12, 2761, 4959, 2, 9613, 579, 2807, 8, 3157