C1111233131211111211113313331333133313231323331311331322333122321   >>    C111123313121111121111331333133313331323132333131133132233312232   <<    C1111233131211111211113313331333133313231323331311331322333122323   >>      C1111233131211111211113313331333133313231323331311331322333122322   >>