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: ['d', 'w', 'R', '3249', '1883', 'V', 'm', 'c', 't', '869', 'a', 'q', '3461', '5529', '9933', 'V', '2033', '2281', '8069', '2989', '363', '1299', 's']

4, 23, 18, 3249, 1883, 22, 13, 3, 20, 869, 1, 17, 3461, 5529, 9933, 22, 2033, 2281, 8069, 2989, 363, 1299, 19