C11111333133313232233133313331333133313231313131211113313113313231321   >>    C1111133313331323223313331333133313331323131313121111331311331323132   <<    C11111333133313232233133313331333133313231313131211113313113313231323   >>      C11111333133313232233133313331333133313231313131211113313113313231322   >>