C11111333133313232233133313331333133313231322321111331311212323131   >>    C1111133313331323223313331333133313331323132232111133131121232313   <<    C11111333133313232233133313331333133313231322321111331311212323133   >>      C11111333133313232233133313331333133313231322321111331311212323132   >>