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: ['a', 'j', 'H', '5773', 'y', '1971', '1455', 'f', '899', '6045', 'c', '903', '1193', 'L', '6063', '3911', '673', 'c', '9195', 'j', '8693', '4287', 'e', '5525', '3429', '1217', 'u', 'h', '7117', 'M', '5997', 'W', 'h', 'p', '983', '9737', 'g']

1, 10, 8, 5773, 25, 1971, 1455, 6, 899, 6045, 3, 903, 1193, 12, 6063, 3911, 673, 3, 9195, 10, 8693, 4287, 5, 5525, 3429, 1217, 21, 8, 7117, 13, 5997, 23, 8, 16, 983, 9737, 7