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: ['2849', 'v', 'j', 'P', 'P', 'o', '9913', '2877', 'v', 'f', 'h', 'y', '1077', 'y', '3663', 'N', 'k', '7767', 'u', 'E']

2849, 22, 10, 16, 16, 15, 9913, 2877, 22, 6, 8, 25, 1077, 25, 3663, 14, 11, 7767, 21, 5