static const int upright_bias[] = { L,L,L,R, R,R,R,R, U,U,U,U, U,D,D,D };
static const int downright_bias[] = { L,L,L,R, R,R,R,R, U,U,U,D, D,D,D,D };
static const int upright_bias[] = { L,L,L,R, R,R,R,R, U,U,U,U, U,D,D,D };
static const int downright_bias[] = { L,L,L,R, R,R,R,R, U,U,U,D, D,D,D,D };