C11111333133313232233133313331333132313231323121111331333223221   >>    C1111133313331323223313331333133313231323132312111133133322322   <<    C11111333133313232233133313331333132313231323121111331333223223   >>      C11111333133313232233133313331333132313231323121111331333223222   >>