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: ['j', 'm', '9745', 'x', '3497', 'j', '2633', 'd', 'o', 'b', 'n', '3693', 'n', 'm', 'R']

10, 13, 9745, 24, 3497, 10, 2633, 4, 15, 2, 14, 3693, 14, 13, 18