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.

['3893', '871', '4431', '8253', 'u', '1579', 'I', '5665', '7581']
3893, 871, 4431, 8253, 21, 1579, 9, 5665, 7581

['Q', 'r', 'R', '7979', '881', '9607', 'v', 'C', '5337', 'd', '287', 'i', 't', 'R', 'S', '5257', 'p', 'a', 'F', 'v', 'Q', 'S', 'u', 'o', '3137', 'B', '5975', '2127', '8831', 'w', 'N', '751']
17, 18, 18, 7979, 881, 9607, 22, 3, 5337, 4, 287, 9, 20, 18, 19, 5257, 16, 1, 6, 22, 17, 19, 21, 15, 3137, 2, 5975, 2127, 8831, 23, 14, 751

['7333', '4413', 'H', '3605', 'L', '8737', '6505', '3921', 'A', 'y', 'S']

7333, 4413, 8, 3605, 12, 8737, 6505, 3921, 1, 25, 19