C11111333133313232233133313331333132313331323321313331333131211111211211311321   >>    C1111133313331323223313331333133313231333132332131333133313121111121121131132   <<    C11111333133313232233133313331333132313331323321313331333131211111211211311323   >>      C11111333133313232233133313331333132313331323321313331333131211111211211311322   >>