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: ['b', '2443', '7841', '3043', 's', 'a', 'n', 'y', '9533', '7743', 'j', 's', 'I', 'P', '1237']

2, 2443, 7841, 3043, 19, 1, 14, 25, 9533, 7743, 10, 19, 9, 16, 1237