C1111233131211111211113313331333133313232212111133131211321323121   >>    C111123313121111121111331333133313331323221211113313121132132312   <<    C1111233131211111211113313331333133313232212111133131211321323123   >>      C1111233131211111211113313331333133313232212111133131211321323122   >>