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: ['4183', '3755', 'U', '2683', '2983', '5071', 'G', '3019', '5433', 'm', 'f', '1127', 'H', '9251', 'v', 't', 'F', 'W', 'K', '1889', 'x', 'L', '1233', '117', '5091', 'l', '5131', '1567', '9095', '4165', 'm', 'h', '9173', '4159']

4183, 3755, 21, 2683, 2983, 5071, 7, 3019, 5433, 13, 6, 1127, 8, 9251, 22, 20, 6, 23, 11, 1889, 24, 12, 1233, 117, 5091, 12, 5131, 1567, 9095, 4165, 13, 8, 9173, 4159