build_0_21 7 5
build_0_6 3 4
build_0_9 4 4
build_11_12 2 4
build_12_13 6 2
build_12_19 3 4
build_13_14 0 1
build_13_15 1 0
build_14_16 0 1
build_17_19 4 3
build_19_20 5 7
build_21_12 7 5
build_6_11 3 4
build_9_17 4 3
