Task: Program Execution
Input (English): 21, ['X', 'O', 'T', 'z', 'b', '9763', 'K', '1657', '549', '773', 't', 'f', 'F', 'f', 'O', '5071', 'c', '385', 'N', 'p', '9355', 'K', 'o', 'w', 'd', 'Z', '1419', '3545', 'R', 'M', '8207', '7563', 'i', '9139', 'S', 'O', '9889', 'k', '2445', '1341', '1779', 'X']
Output (English): X, K