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', '3527', 'Q', 'Z', '7867', 'Y', 'b', '4283', '4937', 'N', 'o', 'R', 'M', 'x', '1965', 'O', 'v', '5163', 'F', '2051', '4293']

6, 3527, 17, 26, 7867, 25, 2, 4283, 4937, 14, 15, 18, 13, 24, 1965, 15, 22, 5163, 6, 2051, 4293