build_0_2 7 1
build_0_21 52 0
build_0_6 47 3
build_12_5 52 0
build_21_12 52 0
build_2_3 7 1
build_3_4 7 1
build_4_5 7 1
build_6_7 47 3
build_7_5 47 3
