Two drunks in a bar

Two drunks were in a bar partying like fools.

They were drinking boiler makers, buying rounds like there was no tomorrow. They were dancing, calling each other "professor," and generally causing quite a stir.

When asked why such a celebration, they boasted that they just finished a jigsaw puzzle & it only took them 2 months! "TWO MONTHS?!" cried the bartender.

"That's ridiculous. It shouldn't take that long!!"

"Oh yeah?" says one drunk. "The box said 2-4 YEARS!"