-ic a-a a-b a-c a-i aaa aab aac aad aai aak aan aar ab- aba abb abc abd abi abk abn abr ac- aca acb acc acd aci ack acn acr ad- ada adb adc add adi adk adn adr ai- aia aib aic aid aii aik ain air aka akb akc akd aki akk akn akr an- ana anb anc and ani ank ann anr ar- ara arb arc ard ari ark arn arr baa bab bac bad bai bak ban bar bba bbb bbc bbd bbi bbk bbn bbr bca bcb bcc bcd bci bck bcn bcr bda bdb bdc bdd bdi bdk bdr bi- bia bib bic bid bii bik bin bir bka bkb bkc bkk bkn bkr bna bnb bnc bnd bni bnk bnn bnr bra brb brd bri brk brn brr c-- caa cab cac cad cai cak can car cba cbb cbc cbd cbi cbk cbn cbr cca ccb ccc ccd cci cck ccn ccr cda cdb cdc cdd cdi cdk cdn cdr ci- cia cib cic cid cii cik cin cir cka ckb ckc ckd cki cn- cna cnb cnc cnd cni cnn cnr cra crb crc crd cri crk crn crr daa dab dac dad dai dak dan dar dba dbb dbc dbd dbi dbk dbn dbr dca dcb dcc dcd dci dck dcn dcr dda ddb ddc ddd ddi ddk ddn ddr di- dia dib dic did dii dik din dir dka dkb dkc dki dkk dkr dna dnb dnc dnd dni dnk dnn dnr dra drb drc drd dri drk drn drr i-d ia- iaa iab iac iad iai ian iar iba ibb ibc ibd ibi ibk ibn ibr ica icb icc icd ici ick icn icr ida idb idc idd idi idk idn idr iia iib iic iid iii iin iir ika ikb ikc iki ikk ikr in- ina inb inc ind ini ink inn inr ir- ira irb irc ird iri irk irn irr ka- kaa kab kac kad kai kak kan kar kba kbb kbc kbd kbi kbk kbn kbr kca kcb kcc kcd kci kck kcn kcr kda kdb kdc kdk kdr kia kib kic kid kii kik kin kir kkb kkc kki kkk kkn kkr kn- kna knc knd kni knk knn knr kra krc krd kri krk krn krr n-i naa nab nac nad nai nak nan nar nba nbb nbc nbd nbi nbk nbn nbr nca ncb ncc ncd nci nck ncn ncr nda ndb ndc ndd ndi ndk ndn ndr nia nib nic nid nii nik nin nir nka nkc nki nkk nkn nkr nna nnb nnc nni nnk nnn nra nrb nrc nrd nri nrk nrn nrr ra- raa rab rac rad rai rak ran rar rba rbb rbc rbd rbi rbk rbn rbr rca rcb rcc rcd rci rcn rcr rda rdb rdc rdd rdi rdn rdr ria rib ric rid rii rik rin rir rkb rkc rkk rna rnb rnc rnd rni rnn rnr rra rrb rrc rrd rri rrk rrn rrr