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: ['7785', '8895', 'I', '5855', '9957', 't', 'N', '3393', 'W', '5013']

7785, 8895, 9, 5855, 9957, 20, 14, 3393, 23, 5013