C1111233131211111211113313331323133313331333132313331311331223213223331   >>    C111123313121111121111331333132313331333133313231333131133122321322333   <<    C1111233131211111211113313331323133313331333132313331311331223213223333   >>      C1111233131211111211113313331323133313331333132313331311331223213223332   >>