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: ['2691', 'k', '9783', '7349', '3139', '6243', '4643', 'F', '8039', '7895', 'f', '8661', '359', 'G', 'n', 'z', '477', '9669', '1615', '6749', '5095', 'd', 'p', 'D', 'I']

2691, 11, 9783, 7349, 3139, 6243, 4643, 6, 8039, 7895, 6, 8661, 359, 7, 14, 26, 477, 9669, 1615, 6749, 5095, 4, 16, 4, 9