Definition: 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.
Input: ['5141', 'U', '3753', '4543', 'I', 'h', 'D', 'O', '6567', '6749', '4609', '1029', 'F', 'Z', 'S', '7169', 'r', '5563', 'B', 'S', '827', 'I', 'C', 'P', 'A', '1491', '3249', '5305', 'Z', 'J', 'V', '8055']

5141, 21, 3753, 4543, 9, 8, 4, 15, 6567, 6749, 4609, 1029, 6, 26, 19, 7169, 18, 5563, 2, 19, 827, 9, 3, 16, 1, 1491, 3249, 5305, 26, 10, 22, 8055