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: ['2067', '4119', 'P', '6271', '479', '2117', 'L', 'D', '9883', 't', 't', '9621', '1663', 'V', '8163', 'p', 'l', 'P', 'Z', 'Z', '3315', '5653', 'q', '9829', '7081', '9149', 'm', '6469', 'Q', '6813', '4487', 'Q']

2067, 4119, 16, 6271, 479, 2117, 12, 4, 9883, 20, 20, 9621, 1663, 22, 8163, 16, 12, 16, 26, 26, 3315, 5653, 17, 9829, 7081, 9149, 13, 6469, 17, 6813, 4487, 17