C11111333133313232233133313331333132313231323121111331313211331   >>    C1111133313331323223313331333133313231323132312111133131321133   <<    C11111333133313232233133313331333132313231323121111331313211333   >>      C11111333133313232233133313331333132313231323121111331313211332   >>