Ole, Sven, and Lars came into the bar. They were high-fiving each other, shouting, and generally having a celebration of some sort.
"Line 'em up," Ole shouted as the party continued.
They drank and carried on for hours. Finally the bartender’s curiousity got the better of him. "Just what are you celebrating?" he asked.
"51 days! We did it in 51 days!" they responded.
"What did you do in 51 days?" he probed.
"Put the puzzle together," they replied, "51 days and the box said 3-5 years!"