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: ['5341', 'x', '2417', 'x', '2453', 'h', '5987', '6739', 'F', '6295', '397', '3093', 'u', 'u', '3569', '3617', '8247', 'e']

5341, 24, 2417, 24, 2453, 8, 5987, 6739, 6, 6295, 397, 3093, 21, 21, 3569, 3617, 8247, 5