a-a a-c aaa aac aak aan aar ac- aca acc ack acn acr aka akc akk akn akr an- ana anc ank ann anr ar- ara arc ark arn arr c-- caa cac cak can car cca ccc cck ccn ccr cka ckc cn- cna cnc cnn cnr cra crc crk crn crr ka- kaa kac kak kan kar kca kcc kck kcn kcr kkc kkk kkn kkr kn- kna knc knk knn knr kra krc krk krn krr naa nac nak nan nar nca ncc nck ncn ncr nka nkc nkk nkn nkr nna nnc nnk nnn nra nrc nrk nrn nrr ra- raa rac rak ran rar rca rcc rcn rcr rkc rkk rna rnc rnn rnr rra rrc rrk rrn rrr