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', '1949', '9185', '4855', '5635', 'Z', '1489', '4099', '6883', 'B', 'T', 'K', '3157', '6773', '8363', '8113', '8881', 'S', '5285', '6283', '473', 'Y', '2187', 'j', 'a', '2669', 't', '1871', 'h', '3157']

6, 1949, 9185, 4855, 5635, 26, 1489, 4099, 6883, 2, 20, 11, 3157, 6773, 8363, 8113, 8881, 19, 5285, 6283, 473, 25, 2187, 10, 1, 2669, 20, 1871, 8, 3157