C1111133313331323223313331333133313331333131211113313331323123321   >>    C111113331333132322331333133313331333133313121111331333132312332   <<    C1111133313331323223313331333133313331333131211113313331323123323   >>      C1111133313331323223313331333133313331333131211113313331323123322   >>