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.

['2839', '9791', '5721', '5165', 'H', 'T', 'u', 'I', 'Z', '3187', 'i', '925', '1561', 'q', '3665', 'S', '7719', 'E', '1893', '2607', '9457', 'c', '5617', '2279', '3469', 'O', '3921', '9471', '2237', 'J', 'J', '3849', '39', 'd', '3545', '8691']
2839, 9791, 5721, 5165, 8, 20, 21, 9, 26, 3187, 9, 925, 1561, 17, 3665, 19, 7719, 5, 1893, 2607, 9457, 3, 5617, 2279, 3469, 15, 3921, 9471, 2237, 10, 10, 3849, 39, 4, 3545, 8691

['V', 'z', '1757', 'K', 'z', 'v', '4761', '6505', '1369', 'Z', 'M', '8471', '7', '3963', '5891', 'W', '8417', '4899', '6537', 'W', 'I', 'M', '4479', 'x', '9089']
22, 26, 1757, 11, 26, 22, 4761, 6505, 1369, 26, 13, 8471, 7, 3963, 5891, 23, 8417, 4899, 6537, 23, 9, 13, 4479, 24, 9089

['3179', '3075', '9335', '7881', '2675', '8049', '9189', 'u', '7959', '7583', 'Y', 'J', 'W', '2971', 'U', 'R', 'b', '6619', '1993', '8555', 'Z', '8957', '2599', '7939', '7409', 'n', 'X', '9117', '9969', 'o', 'A', '9403', '49']

3179, 3075, 9335, 7881, 2675, 8049, 9189, 21, 7959, 7583, 25, 10, 23, 2971, 21, 18, 2, 6619, 1993, 8555, 26, 8957, 2599, 7939, 7409, 14, 24, 9117, 9969, 15, 1, 9403, 49