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', 'I', 'g', '5965', '7847', '7889', 'm', 'l', '6203', '8323', '9621', 'l', '331', 'e', '5693', '2485', '7775', 'n', '2393', '5555', '3227', '901', '5133', 'f', '6159', 'F', '3793', '1543', 'K', 'k', 'x', '6651', 'Y', '1131']

16, 9, 7, 5965, 7847, 7889, 13, 12, 6203, 8323, 9621, 12, 331, 5, 5693, 2485, 7775, 14, 2393, 5555, 3227, 901, 5133, 6, 6159, 6, 3793, 1543, 11, 11, 24, 6651, 25, 1131