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: ['237', '7803', '125', '8703', 'X', '5379', 'K']

237, 7803, 125, 8703, 24, 5379, 11