C11111333133313232233133313331333132313331323321313331333133313113313222212121   >>    C1111133313331323223313331333133313231333132332131333133313331311331322221212   <<    C11111333133313232233133313331333132313331323321313331333133313113313222212123   >>      C11111333133313232233133313331333132313331323321313331333133313113313222212122   >>