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: ['8955', '107', '9571', 'h', '6029', 'r', 'p', 'm', 'd', 'c', 'D', '959']

8955, 107, 9571, 8, 6029, 18, 16, 13, 4, 3, 4, 959