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: ['h', '7831', '1287', 'f', '187', 's', 'h', 'G', '7141', '1891', 'M', 'X', '1695', 'P', '7201', 'J', '4585', '5773', 'c', 'o', '8263', '9049', '91']

8, 7831, 1287, 6, 187, 19, 8, 7, 7141, 1891, 13, 24, 1695, 16, 7201, 10, 4585, 5773, 3, 15, 8263, 9049, 91