qw(5 / 6 3 X X 7 0 4 3 X 4 / 8 1 3 / 6) 146 qw(X X X X X X X X X X X X) 300 qw(0 / X 0 / X 0 / X 0 / X 0 / X 0 /) 0 (should be 200) qw(X 0 / X 0 / X 0 / X 0 / X 0 / X 0) 0 (should be 210)