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: ['9745', 'n', 'Z', '5683', '6773', 'l', '2199', '4669', 'A', '925', '2459', '733', '3969', '6011', 'R', '9129', '3271', 'c', '6359', '2091', 'n', '6709', '2837', '3671', 'J']

9745, 14, 26, 5683, 6773, 12, 2199, 4669, 1, 925, 2459, 733, 3969, 6011, 18, 9129, 3271, 3, 6359, 2091, 14, 6709, 2837, 3671, 10