sentence: A young man solves a cube puzzle while a man stand on front him. sentence:  Then, a man writes on a paper and shows the young man. sentence:  The young man solves again the puzzle is less time, and the man takes note. sentence:  After the young man solves again two times the puzzle in less time. sentence:  At the end, the young man solves the puzzle in less time than the previous times, he raises happy from his chair.