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: ['w', '4213', 'E', '5293', 'r', '1177', 'J', 'u', '1835']

23, 4213, 5, 5293, 18, 1177, 10, 21, 1835