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: ['5667', 'J', '6775', 'U', 'q', 'd', '6997', '4811', 'C', 'W', 'T', 'g', 'W', 'm', '4517', '5789', 'u', 't', 'D', 'N', 'z', '6449', '1211', '8351']

5667, 10, 6775, 21, 17, 4, 6997, 4811, 3, 23, 20, 7, 23, 13, 4517, 5789, 21, 20, 4, 14, 26, 6449, 1211, 8351