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.

['V', 't', '5519', '6271', '9239', 'Q', 'z', '9645', 'I', '6699']
22, 20, 5519, 6271, 9239, 17, 26, 9645, 9, 6699

['a', 'w', 'n', 'R', 'u', 'z']
1, 23, 14, 18, 21, 26

['Z', '5619', 'o', 'x', '7381', 'R', 'f', 'G', 'V', '9337', 'V', '3679', '5891', '6445', '7267']

26, 5619, 15, 24, 7381, 18, 6, 7, 22, 9337, 22, 3679, 5891, 6445, 7267