digraph G{
"72" -> {"20";}
"50" -> {"37";}
"14" -> {"46";"54";"55";}
"45" -> {"62";}
"32" -> {"20";}
"26" -> {"42";"16";}
"6" -> {"64";}
"69" -> {"73";}
"33" -> {"37";}
"49" -> {"37";}
"63" -> {"6";"14";}
"52" -> {"21";}
"53" -> {"38";"24";"2";}
"73" -> {}
"12" -> {"40";}
"5" -> {"13";"22";}
"4" -> {"21";}
"71" -> {"19";"36";}
"25" -> {"34";"28";"26";}
"31" -> {}
"generate" -> {"background";}
"34" -> {"41";"49";}
"47" -> {"37";}
"40" -> {"52";"30";}
"18" -> {"35";}
"28" -> {"65";"9";"17";}
"16" -> {"70";"57";}
"8" -> {}
"56" -> {"69";"39";}
"background" -> {"1";}
"64" -> {"51";"7";"35";}
"42" -> {"50";"58";"66";}
"39" -> {"63";}
"51" -> {"59";"35";}
"65" -> {"37";}
"11" -> {"29";"20";}
"58" -> {"37";}
"17" -> {"37";}
"19" -> {"44";"32";}
"13" -> {"68";"31";}
"0" -> {"generate";"rules";"implementation";}
"20" -> {"71";"3";"23";}
"46" -> {"64";}
"rules" -> {"rules1";"generate";"0";}
"67" -> {"23";}
"60" -> {"4";"12";}
"21" -> {"5";"61";}
"7" -> {"15";"43";}
"23" -> {"60";"40";}
"59" -> {"18";"27";}
"30" -> {"21";}
"68" -> {"64";}
"15" -> {"64";}
"62" -> {"71";"3";"23";}
"48" -> {"5";}
"38" -> {"62";}
"29" -> {"20";}
"rules1" -> {"generate";"0";}
"36" -> {"20";}
"9" -> {"37";}
"10" -> {"5";}
"24" -> {"62";}
"57" -> {"37";}
"22" -> {"63";"56";}
"55" -> {}
"70" -> {"37";}
"2" -> {}
"27" -> {}
"43" -> {}
"61" -> {"48";"8";}
"54" -> {"64";}
"35" -> {"73";"73";}
"1" -> {"25";}
"44" -> {"20";}
"41" -> {"37";}
"66" -> {"37";}
"37" -> {"45";"53";}
"3" -> {"11";"72";}
}