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.

['3857', 'u', 'k', 'x', '5315', 'a', 'r', '6871', 'q', 'w', 'J', 'c', 's', '9307', '9325', '297', 'g', 'P', 'G', 'A', '4155', '9307', '1055', '4619', '1521', '6653', 'y', '8831', '8445', 'g', 'l', 'C', 'a', 'o']
3857, 21, 11, 24, 5315, 1, 18, 6871, 17, 23, 10, 3, 19, 9307, 9325, 297, 7, 16, 7, 1, 4155, 9307, 1055, 4619, 1521, 6653, 25, 8831, 8445, 7, 12, 3, 1, 15

['4245', '3997', 'T', 'N', 'q', '7057', '791', 't']
4245, 3997, 20, 14, 17, 7057, 791, 20

['q', '6547', 'g', '3997', '5257', '5539', '5805', '1829', 'H', '5207', 'Q', 'P', 'X', '8093', '7207', 'V', 'z', 'b', '4977', '2405', '8003', '1883', '6713', 'v', 'u', '2975', '9665', 'T', '9573', 'p', 'V', '7969', '7511']

17, 6547, 7, 3997, 5257, 5539, 5805, 1829, 8, 5207, 17, 16, 24, 8093, 7207, 22, 26, 2, 4977, 2405, 8003, 1883, 6713, 22, 21, 2975, 9665, 20, 9573, 16, 22, 7969, 7511