Fun fact: “six seven” traces its roots all the way back to Old English in the 1380s. Geoffrey Chaucer coined it in his epic poem _Troilus and Criseyd_ :

> But manly set the world on sixe and sevene;

> And, if thou deye a martir, go to hevene."

200 years later, Shakespeare picked it up and used it in his play _Richard II_ :

> But time will not permit: all is uneven

> And every thing is left at six and seven

The common English phrase “at sixes and sevens,” from an early dice game that preceded craps, is unrelated.

> It is thought that the expression was originally _to set on cinque and sice_ (from the French for five and six). These were apparently the most risky numbers to shoot for (‘to set on’) and anyone who tried for them was considered careless or confused.