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: ['1845', '6777', '9521', '2037', '5517', '743', '7057', '8107', '6935', 'a', '3503', 'B', 'o', '4869', 'm', '6871', 'd', '25', '787', 'v', '4779', '7983', '957', 'C', '7891', '6211', 'v', 'F', '5197', '2191', 'u', '8815', '601', '8139']

1845, 6777, 9521, 2037, 5517, 743, 7057, 8107, 6935, 1, 3503, 2, 15, 4869, 13, 6871, 4, 25, 787, 22, 4779, 7983, 957, 3, 7891, 6211, 22, 6, 5197, 2191, 21, 8815, 601, 8139