C1111133313331323223313331333133313113313121111331323132313231211   >>    C111113331333132322331333133313331311331312111133132313231323121   <<    C1111133313331323223313331333133313113313121111331323132313231213   >>      C1111133313331323223313331333133313113313121111331323132313231212   >>