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build_12_13 8 1
build_12_5 22 5
build_13_14 3 0
build_13_15 0 1
build_14_16 3 0
build_21_12 33 6
build_2_3 14 10
build_3_4 14 5
build_4_5 14 5
build_6_7 5 2
build_7_5 5 0
