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: ['C', '1205', 'p', 'b', '9139', '3395', '6331', '9019', 'Y', 'Z', 'm', 'q', 'U', 'x', '3019', 'T', '2603', '5085', 'u', 'u', 'G', 'r', 'O', '3547', 'f', 'W', '335', 'I', 'C', 'u', '9167', 'K', 'q']

3, 1205, 16, 2, 9139, 3395, 6331, 9019, 25, 26, 13, 17, 21, 24, 3019, 20, 2603, 5085, 21, 21, 7, 18, 15, 3547, 6, 23, 335, 9, 3, 21, 9167, 11, 17