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: ['y', '5909', 'k', 'a', '4951', '6555', 'P', '6547', '9827', 'T', 'L', 'n', '4701', '2501', 'q', '3511', 't', '9567', 'N', 'o', '6163', '4069', '123', 'C', '4483', 'Z', '3935', 'J', '5093', 'g', '4369', '771', '8047', '2635', '1893', '8535', '1537', '7619']

25, 5909, 11, 1, 4951, 6555, 16, 6547, 9827, 20, 12, 14, 4701, 2501, 17, 3511, 20, 9567, 14, 15, 6163, 4069, 123, 3, 4483, 26, 3935, 10, 5093, 7, 4369, 771, 8047, 2635, 1893, 8535, 1537, 7619