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: ['1155', '8049', '5273', '2969', 'H', 'h', '1509', '1509', 'j', 'o', '1027', 'I', '3907', '6081', 'c', '1663']

1155, 8049, 5273, 2969, 8, 8, 1509, 1509, 10, 15, 1027, 9, 3907, 6081, 3, 1663