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', 'E', '7811', 'C', 'B', 'P', '9913', 'x', 'd', 'g', '4967', 'k', '2711', 'K', 'I', 'k', 'h', 'I', 'z', '343', 'D', 'r', 'Q']

2, 5, 7811, 3, 2, 16, 9913, 24, 4, 7, 4967, 11, 2711, 11, 9, 11, 8, 9, 26, 343, 4, 18, 17