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.

['4345', '1815', '7973', '6187', 'U', '1133', '8791', '3555', 'i', 's', 'L', 'm', '7695', 'A']
4345, 1815, 7973, 6187, 21, 1133, 8791, 3555, 9, 19, 12, 13, 7695, 1

['n', 'h', '3545', 'u', '9117', 'L', '4145', 'K', 'E', 's', 'Y', '1835', 'X', 'x', 'w', 'T', 'Y', 'P', '3531', 'x', '6953', '9475', 'b', 'x', '2915', '547', '513', '2749', '737', 'l', '3367']
14, 8, 3545, 21, 9117, 12, 4145, 11, 5, 19, 25, 1835, 24, 24, 23, 20, 25, 16, 3531, 24, 6953, 9475, 2, 24, 2915, 547, 513, 2749, 737, 12, 3367

['1089', '6215', '7109', '6301', '1437', '3401', 'x', 'O', '2173', '6735', 'c', '3263', 'I', '171', '979', '8019', '4045', '1365', '9641', '3259', '7509', 'W']
1089, 6215, 7109, 6301, 1437, 3401, 24, 15, 2173, 6735, 3, 3263, 9, 171, 979, 8019, 4045, 1365, 9641, 3259, 7509, 23