C1111233131211111211113313331333133313232321333133313331311233132321123221   >>    C111123313121111121111331333133313331323232133313331333131123313232112322   <<    C1111233131211111211113313331333133313232321333133313331311233132321123223   >>      C1111233131211111211113313331333133313232321333133313331311233132321123222   >>