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: ['2525', '6827', '11', '2909', 'I', 'a', 'Y', '9447', '21', '959', '845', '4961', 'M', '1225', 'H', '4913', 'B', 'R', 'X', '603', '5747', 'i', '1853', '333']

2525, 6827, 11, 2909, 9, 1, 25, 9447, 21, 959, 845, 4961, 13, 1225, 8, 4913, 2, 18, 24, 603, 5747, 9, 1853, 333