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: ['W', 'p', '8807', 'u', 'U', '8319', 'e', 'd', 'g', 'X', '331', 'C', 'm', '9233', '2669', '2177', 'U', '9639', 'V', '5197', '2441', '8149', '783', '8049', 'i', '573', '4921', 'M', 'B', '6501', '1999', '8183', '5099', '9125', '9821']

23, 16, 8807, 21, 21, 8319, 5, 4, 7, 24, 331, 3, 13, 9233, 2669, 2177, 21, 9639, 22, 5197, 2441, 8149, 783, 8049, 9, 573, 4921, 13, 2, 6501, 1999, 8183, 5099, 9125, 9821