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', '3331', 'z', 'j', 's', '5005', '9249', '8297', '4653', 'i', 'z', 'i', '4021', '615', '8949', 'E', '1663', 'Z', 'n', 'B', '4253', 'X', '8671', 'b', 'u', '7139', '1783', 'q', 'h', '4515', 'O', '4329', 'L', 'E', 'D', 'f']

10, 3331, 26, 10, 19, 5005, 9249, 8297, 4653, 9, 26, 9, 4021, 615, 8949, 5, 1663, 26, 14, 2, 4253, 24, 8671, 2, 21, 7139, 1783, 17, 8, 4515, 15, 4329, 12, 5, 4, 6