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: ['8849', '3759', '1355', 'd', 'n', '5979', 'k', 'Q', 'B', '1767', '3291', 'X', '8899', '5783', '5441', '3207', '8827', '9325', '5607', '4129', 'b', '9189', '3787', '2857', 'y', 'o', 'I', '6651']

8849, 3759, 1355, 4, 14, 5979, 11, 17, 2, 1767, 3291, 24, 8899, 5783, 5441, 3207, 8827, 9325, 5607, 4129, 2, 9189, 3787, 2857, 25, 15, 9, 6651