C1111133313331323223313331333133313331323131211111122112312112121   >>    C111113331333132322331333133313331333132313121111112211231211212   <<    C1111133313331323223313331333133313331323131211111122112312112123   >>      C1111133313331323223313331333133313331323131211111122112312112122   >>