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: ['b', '6751', '9437', 'O', '1469', 'H', 'o', '659', 'F', '2639', 'C', '4177', 'E', 'g', '7327', 'M', '9875', 'B', '41', 'o', 'a', 'j', '8185', '6519', 'z', 'N', 'i', '5159']

2, 6751, 9437, 15, 1469, 8, 15, 659, 6, 2639, 3, 4177, 5, 7, 7327, 13, 9875, 2, 41, 15, 1, 10, 8185, 6519, 26, 14, 9, 5159