C11111333133313232233133313331333132313231323121111331333112121211   >>    C1111133313331323223313331333133313231323132312111133133311212121   <<    C11111333133313232233133313331333132313231323121111331333112121213   >>      C11111333133313232233133313331333132313231323121111331333112121212   >>