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: ['2749', '3787', '3419', '2029', 'd', '8647', '3471', '7645', '3879', '1915', '7783', 'c', '6339', 'F', '5463', 'w', '3367', 'B', 'R', '4543', 'y', '2539', 't', 'l', 'F', '8025']

2749, 3787, 3419, 2029, 4, 8647, 3471, 7645, 3879, 1915, 7783, 3, 6339, 6, 5463, 23, 3367, 2, 18, 4543, 25, 2539, 20, 12, 6, 8025