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: ['Q', '793', 'z', 'g', '5395', 'Q', 'j', '4431', '1033', '2191', 'O', '9711', 'H', '4313', 'I', '3645']

17, 793, 26, 7, 5395, 17, 10, 4431, 1033, 2191, 15, 9711, 8, 4313, 9, 3645