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.

['L', 'M', '9547', '9787', 'C', '6993', '5623', 'N', 'x', '3495', '6071', '5413', 'Y', '5191', '9621', 'X', '8557', '7949', '5691', 'u', '7527', '621', '6899', 'E', 'K', 'a']
12, 13, 9547, 9787, 3, 6993, 5623, 14, 24, 3495, 6071, 5413, 25, 5191, 9621, 24, 8557, 7949, 5691, 21, 7527, 621, 6899, 5, 11, 1

['8941', 'S', '7811', '3683', 'c', '4133', '7281', 'q', 't', 'L', 'H', '8555', 'h', '7851', 'x', '4329', 'Z', 'S', '2173', 'f', '6157', 'q']
8941, 19, 7811, 3683, 3, 4133, 7281, 17, 20, 12, 8, 8555, 8, 7851, 24, 4329, 26, 19, 2173, 6, 6157, 17

['2493', 'u', 'R', 'v', '4657', 'c', '3483', 'S']

2493, 21, 18, 22, 4657, 3, 3483, 19