C1111233131211111211113313331333133313331333133313331333133313331322212121121   >>    C111123313121111121111331333133313331333133313331333133313331333132221212112   <<    C1111233131211111211113313331333133313331333133313331333133313331322212121123   >>      C1111233131211111211113313331333133313331333133313331333133313331322212121122   >>