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: ['2485', '8367', '1121', 'n', 'a', '1313', '8521', 'Y', '1873', 'Y', '3095', '4083', '7549', '2301', 'p', '3147', '2893', 'r', 'm', '5041', '8219', '2345', 'T', '4267', '7513', 'l', '5209', '8385', '2791', 'h', 'S', 's']

2485, 8367, 1121, 14, 1, 1313, 8521, 25, 1873, 25, 3095, 4083, 7549, 2301, 16, 3147, 2893, 18, 13, 5041, 8219, 2345, 20, 4267, 7513, 12, 5209, 8385, 2791, 8, 19, 19