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: ['6145', 'H', 't', 'S', 'o', 'B', '5507', 'y', 'P', 'p', 'X', '7155', '4651', 'n', 'h', '301', '2557', '2889', '6167', '3359', 'h', 'D', '9195', 'P', 'B', '2159', '6509', '9283', '9749', 'T', 'R', 'f', 'g', 'N', 'C', '2949', 'r', '733']

6145, 8, 20, 19, 15, 2, 5507, 25, 16, 16, 24, 7155, 4651, 14, 8, 301, 2557, 2889, 6167, 3359, 8, 4, 9195, 16, 2, 2159, 6509, 9283, 9749, 20, 18, 6, 7, 14, 3, 2949, 18, 733