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: ['F', 'w', 'z', '7463', 'U', '9797', 'D', '4009', 'L', 'v', '5631', '1963', 'n', '2871', '8851', '725', '4247', '7909', 'X', 'D', '6433', 'p', '8461', '1213', 'j', '4027', '5887', '8877', 'b', 'U', 'f', '9045', '9195', '2865', '4043', 't', '7983', 'i', '5763']

6, 23, 26, 7463, 21, 9797, 4, 4009, 12, 22, 5631, 1963, 14, 2871, 8851, 725, 4247, 7909, 24, 4, 6433, 16, 8461, 1213, 10, 4027, 5887, 8877, 2, 21, 6, 9045, 9195, 2865, 4043, 20, 7983, 9, 5763