-ic a-a a-b a-c a-i aaa aab aac aai aak aan aao aav ab- aba abb abc abi abk abn abo abv ac- aca acb acc aci ack acn aco acv ai- aia aib aic aii aik ain aio aiv aka akb akc aki akk akn ako akv an- ana anb anc ani ank ann ano anv aoa aob aoc aoi aok aon aoo aov av- ava avb avc avi avk avn avo baa bab bac bai bak ban bao bav bba bbb bbc bbi bbk bbn bbo bca bcb bcc bci bck bcn bco bcv bi- bia bib bic bii bik bin bio biv bka bkb bkc bkk bkn bko bkv bna bnb bnc bni bnk bnn bno bnv boa bob boc boi bok bon boo bov bva bvb bvc bvi bvk bvn bvo bvv c-- caa cab cac cai cak can cao cav cba cbb cbc cbi cbk cbn cbo cbv cca ccb ccc cci cck ccn cco ccv ci- cia cib cic cii cik cin cio civ cka ckb ckc cki cko cn- cna cnb cnc cni cnn cno cnv co- coa cob coc coi cok con coo cov cva cvb cvc cvi cvk cvn cvo cvv i-v ia- iaa iab iac iai ian iao iav iba ibb ibc ibi ibk ibn ibo ibv ica icb icc ici ick icn ico icv iia iib iic iii iin iio ika ikb ikc iki ikk iko ikv in- ina inb inc ini ink inn ino inv io- ioa iob ioc ioi ion ioo iov iva ivb ivc ivi ivo ivv ka- kaa kab kac kai kak kan kao kav kba kbb kbc kbi kbk kbn kbo kca kcb kcc kci kck kcn kia kib kic kii kik kin kio kiv kkb kkc kki kkk kkn kkv kn- kna knc kni knk knn kno koa kob koc koi kok kon koo kva kvb kvi kvk kvn kvo kvv n-i naa nab nac nai nak nan nao nav nba nbb nbc nbi nbk nbn nbo nbv nca ncb ncc nci nck ncn nco ncv nia nib nic nii nik nin nio niv nka nkc nki nkk nkn nko nna nnb nnc nni nnk nnn nno nnv no- noa nob noc noi nok non noo nov nva nvb nvc nvi nvk nvn nvv o-i oaa oab oac oai oak oan oao oav ob- oba obb obc obi obk obn obo obv oc- oca ocb occ oci ock ocn oco ocv oia oib oic oii oik oin oio oiv oka okb okc oki okk oko on- ona onb onc oni onk onn ono oo- ooa oob ooc ooi ook oon ooo oov ov- ova ovb ovc ovi ovo ovv v-a vaa vab vac vai vak van vao vav vba vbc vbi vbk vbo vbv vca vcc vci vcn vco vi- via vib vic vii vik vin vio viv vka vkb vn- vna vni vno vnv voa vob voc voi vok von voo vov vva vvb vvc vvi vvo vvv