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', 'a', 'P', '175', '6077', 'v', '517', 'V', '5353', 'K', '8171', '4875', 'Z', 'R', 'O', '525', 'r', '5183', '9235', '249', 'Y', 'R', '7365', '6957', 'u', '7695', 'p', 'A', '5107', '9819', 'I', '6113', 'N', 'I', '6385', '3271', '8429', 'P', '9677', 'U']

1, 1, 16, 175, 6077, 22, 517, 22, 5353, 11, 8171, 4875, 26, 18, 15, 525, 18, 5183, 9235, 249, 25, 18, 7365, 6957, 21, 7695, 16, 1, 5107, 9819, 9, 6113, 14, 9, 6385, 3271, 8429, 16, 9677, 21