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: ['L', 'n', '7153', 'r', '7337', '2423', 'D', 'd', 'q', 'q', '2383', 'b', 'f', '1163', 'T', '9955', 'z', 'P', 'K', '9253', 'd', 'i', 'I', 'W', 'p', '9549', '6495', 'P', '843']

12, 14, 7153, 18, 7337, 2423, 4, 4, 17, 17, 2383, 2, 6, 1163, 20, 9955, 26, 16, 11, 9253, 4, 9, 9, 23, 16, 9549, 6495, 16, 843