Challenges

A hand is five cards as "2H 3S 4D 5C 6H" — rank then suit, space separated, and always sorted by rank, ascending. The rank ladder is A 2 3 4 5 6 7 8 9 T J Q K: the ace is low, so A-2-3-4-5 is a run and A-T-J-Q-K is not. Match a hand whose five ranks are consecutive on that ladder.

Match a well-formed hand: exactly five cards, single space separated, each a rank from A23456789TJQK followed by a suit from SHDC — and no card appearing twice. Hands are always sorted by rank, ascending.

A hand is five cards as "AS 7H 7D 9C KS" — rank then suit, space separated, and always sorted by rank, ascending. Capture the rank that appears more than once, or match nothing if every rank is different.

A hand is five cards as "AS 2H 5D 9C KS" — rank then suit, space separated. Ranks are A23456789TJQK (T is ten), suits are SHDC. Capture the suit if all five cards share one; no match if they do not.