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.

['8623', '1535', '2699', 'e', '1463', '279']
8623, 1535, 2699, 5, 1463, 279

['1171', '7585', 'H', 'R', '367', '4509', '9555', '9691', '8173', '6007', '2391', '4867', 't', 'l', '5127', 'W', '3795', 'p', '8375']
1171, 7585, 8, 18, 367, 4509, 9555, 9691, 8173, 6007, 2391, 4867, 20, 12, 5127, 23, 3795, 16, 8375

['C', '4221', '3325', 'x', '4145', '7675', 'C', '2491', '7163', '7101', 'J', '5003', '953', 'E', '1543', 'M', 'f', 'M', '5071', 'c', 'B', '2291', '4863', '2113', '3725', '3467', '7247', '1635', '2139', 'N', '735', '5087', '5839', 'j', 'i']
3, 4221, 3325, 24, 4145, 7675, 3, 2491, 7163, 7101, 10, 5003, 953, 5, 1543, 13, 6, 13, 5071, 3, 2, 2291, 4863, 2113, 3725, 3467, 7247, 1635, 2139, 14, 735, 5087, 5839, 10, 9