build_0_21 0 3
build_0_6 1 4
build_0_9 0 2
build_11_12 1 4
build_12_13 0 1
build_12_19 1 6
build_13_15 0 1
build_17_19 0 2
build_19_20 1 8
build_21_12 0 3
build_6_11 1 4
build_9_17 0 2
