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.

['2973', 'a', '6251', 's', '5009', 'm', 'G']
2973, 1, 6251, 19, 5009, 13, 7

['9307', 't', '7521', '1787', 'K', 'R', 'S', 'q', 'Q', '9679', '6415', 'V', '9593', 'X', 'U', '707', '3367', 'J', 'H', 'Q', '9889', 'w', 'd', '7075', 'L', 'F', 'j', 't', 'W', 'r', '4743', '2469', 'D', 's', '4687', 'n']
9307, 20, 7521, 1787, 11, 18, 19, 17, 17, 9679, 6415, 22, 9593, 24, 21, 707, 3367, 10, 8, 17, 9889, 23, 4, 7075, 12, 6, 10, 20, 23, 18, 4743, 2469, 4, 19, 4687, 14

['T', 'b', 'i', 'C', 'p', 'A', '345', '2435', '4851', 'h', 'h', '87', '847', 'W', 'X', 'Q', '4915', 'V', 'I', 'P', 'z', 'f', '289', 'F', '721', '9653', '1387', 'w', '6537', '4481', 'd', '6085', 'C', 't']

20, 2, 9, 3, 16, 1, 345, 2435, 4851, 8, 8, 87, 847, 23, 24, 17, 4915, 22, 9, 16, 26, 6, 289, 6, 721, 9653, 1387, 23, 6537, 4481, 4, 6085, 3, 20