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: ['p', 'V', '1039', '655', '4745', '8885', 'g', '2943', '7903', '7449', 'E', 's', 'r', '9283', '7869', '6245', 'n', 'A']

16, 22, 1039, 655, 4745, 8885, 7, 2943, 7903, 7449, 5, 19, 18, 9283, 7869, 6245, 14, 1