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: ['3739', '5605', '9243', 'H', '7695', '7223', '1151', 'c', '1941', '5475', '5905', '935', 'p', '7301', 'z', 'Q', '6625', '4313', 'V', 'v', 'u']

3739, 5605, 9243, 8, 7695, 7223, 1151, 3, 1941, 5475, 5905, 935, 16, 7301, 26, 17, 6625, 4313, 22, 22, 21