C1111233131211111211113313331333133313232212111133133322212331223321   >>    C111123313121111121111331333133313331323221211113313332221233122332   <<    C1111233131211111211113313331333133313232212111133133322212331223323   >>      C1111233131211111211113313331333133313232212111133133322212331223322   >>