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: ['F', 'q', 'p', '7261', '421', '3593', '9991', 'E', '7419', 'A', '869', '4387', '8215', 'Z', 'e', 'h', 'I', '2019', 'h', 'M', 'j', 'j', '8543', 'u', 'T', '7551', 'u', '313', 'V', 'z', 'f']

6, 17, 16, 7261, 421, 3593, 9991, 5, 7419, 1, 869, 4387, 8215, 26, 5, 8, 9, 2019, 8, 13, 10, 10, 8543, 21, 20, 7551, 21, 313, 22, 26, 6