MakePair create a pair from a and b.

Pair is a tuple of two elements.

Triple is a tuple of three elements.

Tuple4 is a tuple of four elements.

Tuple5 is a tuple of five elements.

Tuple6 is a tuple of six elements.

Tuple7 is a tuple of seven elements.

Tuple8 is a tuple of eight elements.

Tuple9 is a tuple of nine elements.