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: ['Q', '4719', 'y', 'i', '1185', '145', 'U', 'f', '997', 'q', 'd', '2369', '6969', 'Z', 'p']

17, 4719, 25, 9, 1185, 145, 21, 6, 997, 17, 4, 2369, 6969, 26, 16