C11111333133313232233133313331333133313221333133313232212111111331323132121   >>    C1111133313331323223313331333133313331322133313331323221211111133132313212   <<    C11111333133313232233133313331333133313221333133313232212111111331323132123   >>      C11111333133313232233133313331333133313221333133313232212111111331323132122   >>