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.

['2581', 'X', '3249', '753', '5639']
2581, 24, 3249, 753, 5639

['8315', '3189', 'j', 'n', 't', 'U', '4163', 'z', '4013', '3159', '8169', '8649', '431', '6291', '1107', '9565', 'm', '1835', '3']
8315, 3189, 10, 14, 20, 21, 4163, 26, 4013, 3159, 8169, 8649, 431, 6291, 1107, 9565, 13, 1835, 3

['519', '6529', '9775', '4469', 'Y', '1659', '6733', '4865', 'V', '3563', 'T', 'J', '5537', '8023', 'C', 'z', 'E', 'e', 'O']

519, 6529, 9775, 4469, 25, 1659, 6733, 4865, 22, 3563, 20, 10, 5537, 8023, 3, 26, 5, 5, 15