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', 'i', '8431', '7209', 'y', '9603', 'f', 'c', 'V', '4337', 'i', 'i', 'r', '4313', '9077', '2555', 'e']

10, 9, 8431, 7209, 25, 9603, 6, 3, 22, 4337, 9, 9, 18, 4313, 9077, 2555, 5