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: ['7191', '5527', 'f', '5437', '2913', '1033', 'A', '233', '1999', '9665', 'W', '2173', 'B', '1183', 'f']

7191, 5527, 6, 5437, 2913, 1033, 1, 233, 1999, 9665, 23, 2173, 2, 1183, 6