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: ['p', '9471', 'r', 'p', 'L', 'S', '4159', 'd', '9123', 'k', '3679', 'n', '6669', 'x', 'N', '9671', 'f', '3529', '8145', '3093', '8717', '4421', '1425', 't', 'c', 'L', '923', 'g', 'T', '3299', '8425', 'X']

16, 9471, 18, 16, 12, 19, 4159, 4, 9123, 11, 3679, 14, 6669, 24, 14, 9671, 6, 3529, 8145, 3093, 8717, 4421, 1425, 20, 3, 12, 923, 7, 20, 3299, 8425, 24