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.

['R', '4841', '221', 'p', 'K', '8845', '1765', '7773', 'D', '9859', '8781', 'n', 'J', 's', 'N', '221', '6879', '1257', 'a', 'O', '393', '7189']
18, 4841, 221, 16, 11, 8845, 1765, 7773, 4, 9859, 8781, 14, 10, 19, 14, 221, 6879, 1257, 1, 15, 393, 7189

['W', 'n', 'W', '6269', '3311', 'b', 'H', 'd', '6911']
23, 14, 23, 6269, 3311, 2, 8, 4, 6911

['a', 't', 'b', 'M', 'x', '3359', 'A', 's', '9163', '1031', 'c', '7113', '3509', 'H', 'm', '8541', 'X', '6811', 'Z', '8169', '5251', '7485', '6047', '7493', 'T', 'd', 'E', 'C', '6633']

1, 20, 2, 13, 24, 3359, 1, 19, 9163, 1031, 3, 7113, 3509, 8, 13, 8541, 24, 6811, 26, 8169, 5251, 7485, 6047, 7493, 20, 4, 5, 3, 6633