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.

['9409', '5955', '9349', '8275', '3975', 'c', 'v', 'L', '1561', 'f', 'p']
9409, 5955, 9349, 8275, 3975, 3, 22, 12, 1561, 6, 16

['K', '4665', '7541', '2649', '9007', '3267', '929', 'B', 'K']
11, 4665, 7541, 2649, 9007, 3267, 929, 2, 11

['8957', 'U', 'X', '289', '5467', 'e', '8953', '1295', '8719', '6529', '7173', 'D', '9957', '55', '7567', 'k', 'l', '1651', 'Y', 'Z']

8957, 21, 24, 289, 5467, 5, 8953, 1295, 8719, 6529, 7173, 4, 9957, 55, 7567, 11, 12, 1651, 25, 26