Given the task definition and input, reply with output. 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.

['4215', 'x', '6649', '4443', 'S', 'r', 'S', '6087', '673', 'Z', '6759', 'F', 'z', '8939', 'Y', 'G', 'J', '5927', 'H', '931', 's', 'o', 'U', 'w', '6569', '3313', 'K', '4969', '6147']

4215, 24, 6649, 4443, 19, 18, 19, 6087, 673, 26, 6759, 6, 26, 8939, 25, 7, 10, 5927, 8, 931, 19, 15, 21, 23, 6569, 3313, 11, 4969, 6147