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: ['3347', '5045', '5025', 'E', '5127', 'h', 'y', 'K', '943', '6205', '7191', 'm', '141', 'B', 'C', '4269', 'f', '5559', 'D', 'w', '415', 'h', 'R', '6337', '1991']

3347, 5045, 5025, 5, 5127, 8, 25, 11, 943, 6205, 7191, 13, 141, 2, 3, 4269, 6, 5559, 4, 23, 415, 8, 18, 6337, 1991