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: ['d', '9719', '7871', '9313', 'V', 'P', 'm', 'q', 'B', 'p', 'b', '1321', '3331', '8969', '8835', 'Z', 'C', '5717']

4, 9719, 7871, 9313, 22, 16, 13, 17, 2, 16, 2, 1321, 3331, 8969, 8835, 26, 3, 5717