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: ['3833', 'B', 'f', 'u', 'f', '6065', '375', 'R', '6061', '2915', 'a', 'h', '3363', '3495', '5205', 'e', 'd']

3833, 2, 6, 21, 6, 6065, 375, 18, 6061, 2915, 1, 8, 3363, 3495, 5205, 5, 4