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: ['V', 'D', '1151', 'g', 'P', '1255', '6465', '1577', 'k', '141', '5711', 't', '3791', 'o', 'B', '7669', 'l']

22, 4, 1151, 7, 16, 1255, 6465, 1577, 11, 141, 5711, 20, 3791, 15, 2, 7669, 12