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: ['b', '867', '6927', '5855', 'C', 'x', '4063', 'C', 'm', '3491', 'V', 'E', 'C', 'o']

2, 867, 6927, 5855, 3, 24, 4063, 3, 13, 3491, 22, 5, 3, 15