## Description
_Krypto_ is a mathematical card game. The deck consists of 52 cards; two sets
of with the numbers 0 through 25. Each player is dealt five cards at the start
of the game and one card is placed face up for all players to see. In a
player’s turn the goal is to use all five cards in the player’s hand to
recreate the number on the open target card. To get to this number the player
can propose a mathematical expression using add, subtract, multiply and divide
operators as well as parentheses. If the expression is correct the player wins
the game. If the expression is incorrect or the player doesn’t make a proposal
within three minutes the player loses its turn. If the player cannot make an
expression he or she can opt to trade one of the cards from his or her deck
with a new one, but this also ends the player’s turn.