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: ['3751', 'z', 's', 'V', 'V', '5043', '2965', '2041', '1187', 'O', 'l', '3909', '4663', '6259', 'Z', 'Q', 'n', '2939', '4451', '2101', 'a', 'u', 'v', '6355', '8167', 'T', '8363', 'y', 'z', '7853', '5499', 'v', '9149', 's', 'K', 'f', '7535', 'Y', 'v']

3751, 26, 19, 22, 22, 5043, 2965, 2041, 1187, 15, 12, 3909, 4663, 6259, 26, 17, 14, 2939, 4451, 2101, 1, 21, 22, 6355, 8167, 20, 8363, 25, 26, 7853, 5499, 22, 9149, 19, 11, 6, 7535, 25, 22