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: ['v', '3545', 'Z', 'O', '8613', '4113', 't', 'P', 'n', '3043', 'G', '4849', 'j', 'z', '8759', 'f', '7613', 'Y', 'r', '6895', '971', 'B', 'i', '8049', 'I', '9327', 'y', 'p', '4777', '4033', '9783', 'C', '5209', 'U']

22, 3545, 26, 15, 8613, 4113, 20, 16, 14, 3043, 7, 4849, 10, 26, 8759, 6, 7613, 25, 18, 6895, 971, 2, 9, 8049, 9, 9327, 25, 16, 4777, 4033, 9783, 3, 5209, 21