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: ['D', '7791', '1365', 'l', '4921', '8169', 'P', '1235', 'd', '8377', '7939', 'D', '5139', 'p', 'y', 'a', 'Y', 'n', '8601', 'k', '3831', '7083', 'i', '7863', 's', 'R', 'F', 'y', 'q', '6631', 'u', 'l', '9433']

4, 7791, 1365, 12, 4921, 8169, 16, 1235, 4, 8377, 7939, 4, 5139, 16, 25, 1, 25, 14, 8601, 11, 3831, 7083, 9, 7863, 19, 18, 6, 25, 17, 6631, 21, 12, 9433