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: ['j', '5781', '3941', 'D', '3319', '5437', '9711', '8005', 'Y', '6351', '8849', '4817', '1047']

10, 5781, 3941, 4, 3319, 5437, 9711, 8005, 25, 6351, 8849, 4817, 1047