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: ['f', '83', 'x', '3801', 't', '6653', '9961', '9841', '8297', 'V', '6269', '5237', 'a', '3001', 'V', '9369', '9419', '253', 'r', '1055', '3025', '5425', 's', '3437', 'U', '1255', 'V', 'a', 's', '5931', 'x']

6, 83, 24, 3801, 20, 6653, 9961, 9841, 8297, 22, 6269, 5237, 1, 3001, 22, 9369, 9419, 253, 18, 1055, 3025, 5425, 19, 3437, 21, 1255, 22, 1, 19, 5931, 24