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: ['1887', 'W', '837', '8371', '7937', '3037', 'f']

1887, 23, 837, 8371, 7937, 3037, 6