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: ['t', '2417', 't', 'y', 'H', 'r', 'e', 'D', 'd', '3793', 'K', '9563', 'b', '2433', '4863', 'd', 'c']

20, 2417, 20, 25, 8, 18, 5, 4, 4, 3793, 11, 9563, 2, 2433, 4863, 4, 3