[{x:2,a:7},"",{x:6},""],
[{y:-0.875,x:1},"",{x:1},"",{x:4},"",{x:1},""],
[{y:-0.875},"",{x:3},"",{x:2},"",{x:3},""],
[{y:-0.25,x:2},"",{x:6},""],
[{y:-0.875,x:1},"",{x:1},"",{x:4},"",{x:1},""],
[{y:-0.875},"",{x:3},"",{x:2},"",{x:3},""],
[{y:-0.25,x:2},"",{x:6},""],
[{y:-0.875,x:1},"",{x:1},"",{x:4},"",{x:1},""],
[{y:-0.875},"",{x:3},"",{x:2},"",{x:3},""],
[{x:2.5},"",{x:5},""],
[{y:-0.75,x:3.5},"",{x:3},""],
[{y:-0.75,x:4.5},"",{x:1},""]