board 16 16 B N N N B N N N N N N B N N N N W C C C C C C C C W C C C C C C W C C C C C C C C N C C C C N W W C C C C N C C C C C C C C C C W C N W C C C C C C C W C C C C B C C C C C C W C C N C C C C N W B C C C C C N C C C C B C C C W C C C C C C B B W C C C C C C W C C C C C C B B W C C C C C C W C C N W C C N N C C C C C C N W C C C C C C C B C C C C B C C W W C C C C C C C C C W C C C C W N C C C C C W C C N C C C W C W C C C C C C C C C C C C C C C B C B C C C C C C N W C C C C C W C C C C C W C C C C C W C C C robots 5 0 0 1 0 2 0 3 0 4 0 target 0 0 4 -1 solution 1 move 0 0 4