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', 'm', '8063', 'l', 'R', 'f', '1911', 'z', '5321', '9499', '1699', 'D', 'U', 'B', '1459', '9273', '5981', '8825', 'c', 'I', '9029', 'o', '1903', 'l', 'U', 'I', 'P', 'E', 't', 'O', '3231', '899', 's', 'c', 'u', '7863', 'V']

17, 13, 8063, 12, 18, 6, 1911, 26, 5321, 9499, 1699, 4, 21, 2, 1459, 9273, 5981, 8825, 3, 9, 9029, 15, 1903, 12, 21, 9, 16, 5, 20, 15, 3231, 899, 19, 3, 21, 7863, 22