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: ['577', 'Z', '9185', 'P', '6219', '4633', '8063', 'l', '3185', 'x', 'm', '4043', '371', '9087', '6023', '3665', '283', '1231', 'a', '7239', 'K', '81', 'S', 'R', '7091', '2895', '7361', 'y', '7791', '7631']

577, 26, 9185, 16, 6219, 4633, 8063, 12, 3185, 24, 13, 4043, 371, 9087, 6023, 3665, 283, 1231, 1, 7239, 11, 81, 19, 18, 7091, 2895, 7361, 25, 7791, 7631