C11111333133313232233133313331333133112211331323132313232211331   >>    C1111133313331323223313331333133313311221133132313231323221133   <<    C11111333133313232233133313331333133112211331323132313232211333   >>      C11111333133313232233133313331333133112211331323132313232211332   >>