-ic a-a a-b a-c a-i aaa aab aac aad aai aak aan ab- aba abb abc abd abi abk abn ac- aca acb acc acd aci ack acn ad- ada adb adc add adi adk adn ai- aia aib aic aid aii aik ain aka akb akc akd aki akk akn an- ana anb anc and ani ank ann baa bab bac bad bai bak ban bba bbb bbc bbd bbi bbk bbn bca bcb bcc bcd bci bck bcn bda bdb bdc bdd bdi bdk bi- bia bib bic bid bii bik bin bka bkb bkc bkk bkn bna bnb bnc bnd bni bnk bnn c-- caa cab cac cad cai cak can cba cbb cbc cbd cbi cbk cbn cca ccb ccc ccd cci cck ccn cda cdb cdc cdd cdi cdk cdn ci- cia cib cic cid cii cik cin cka ckb ckc ckd cki cn- cna cnb cnc cnd cni cnn daa dab dac dad dai dak dan dba dbb dbc dbd dbi dbk dbn dca dcb dcc dcd dci dck dcn dda ddb ddc ddd ddi ddk ddn di- dia dib dic did dii dik din dka dkb dkc dki dkk dna dnb dnc dnd dni dnk dnn i-d ia- iaa iab iac iad iai ian iba ibb ibc ibd ibi ibk ibn ica icb icc icd ici ick icn ida idb idc idd idi idk idn iia iib iic iid iii iin ika ikb ikc iki ikk in- ina inb inc ind ini ink inn ka- kaa kab kac kad kai kak kan kba kbb kbc kbd kbi kbk kbn kca kcb kcc kcd kci kck kcn kda kdb kdc kdk kia kib kic kid kii kik kin kkb kkc kki kkk kkn kn- kna knc knd kni knk knn n-i naa nab nac nad nai nak nan nba nbb nbc nbd nbi nbk nbn nca ncb ncc ncd nci nck ncn nda ndb ndc ndd ndi ndk ndn nia nib nic nid nii nik nin nka nkc nki nkk nkn nna nnb nnc nni nnk nnn