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: ['3883', '4739', 'R', 'D', 'O', '5967', 'o', 'J', 'g', 'p']

3883, 4739, 18, 4, 15, 5967, 15, 10, 7, 16