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: ['2739', 'd', '8845', 'd', '575', 'C', '3831', 'I', 'y', '2723']

2739, 4, 8845, 4, 575, 3, 3831, 9, 25, 2723