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: ['6725', '9677', 'R', '5781', 'v', '303', 'w', '1183', 'O', '77', '5151', '4893', 'S', '1177', '5881', 'E', 'F', '5953', '7671', '3833', '8307', '4001', '8401', 'L', '8787', '7613', '5923', '5155', '6249', '377', 'L', '1887', 'q']

6725, 9677, 18, 5781, 22, 303, 23, 1183, 15, 77, 5151, 4893, 19, 1177, 5881, 5, 6, 5953, 7671, 3833, 8307, 4001, 8401, 12, 8787, 7613, 5923, 5155, 6249, 377, 12, 1887, 17