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.

[EX Q]: ['5671', 'O', 'r', '2473', '9907', '9515', '9817', 'E', '5479', 'G', '6493', '7015']
[EX A]: 5671, 15, 18, 2473, 9907, 9515, 9817, 5, 5479, 7, 6493, 7015

[EX Q]: ['8407', 'L', 'p', '5585', 'b', '9035', 's', '1007', '9889', '9993', 'H']
[EX A]: 8407, 12, 16, 5585, 2, 9035, 19, 1007, 9889, 9993, 8

[EX Q]: ['3095', '1063', '6113', 'A', 't', '2097', '9063', '9519', '4577', 'J', 'l', '521', '7139']
[EX A]:
3095, 1063, 6113, 1, 20, 2097, 9063, 9519, 4577, 10, 12, 521, 7139