Poker hands with ranking. Consider a regular deck of 52 cards as
usual with 5 cards dealt. You have learned all those 8 patterns:
one pair, two pairs, three of a kind, straight, flush, full
house, four of a kind, and straight flush (with royal flush a
special kind of straight flush).
Note ace is counted as both 1 point and 14 points. So in
counting straight, A2345 and 10JQKA are both valid.
Compute / derive the number of ways...