-ic a-a a-b a-c a-i aaa aab aac aaf aai aan aao aar ab- aba abb abc abf abi abn abo abr ac- aca acb acc acf aci acn aco acr af- afa afb afc aff afi afn afo afr ai- aia aib aic aif aii ain aio air an- ana anb anc anf ani ann ano anr aoa aob aoc aof aoi aon aoo aor ar- ara arb arc arf ari arn aro arr baa bab bac baf bai ban bao bar bba bbb bbc bbf bbi bbn bbo bbr bca bcb bcc bcf bci bcn bco bcr bfa bfb bfc bff bfi bfn bfo bfr bi- bia bib bic bif bii bin bio bir bna bnb bnc bnf bni bnn bno bnr boa bob boc bof boi bon boo bor bra brb brf bri brn bro brr c-- caa cab cac caf cai can cao car cba cbb cbc cbf cbi cbn cbo cbr cca ccb ccc ccf cci ccn cco ccr cfa cfb cfc cff cfi cfn cfo cfr ci- cia cib cic cif cii cin cio cir cn- cna cnb cnc cnf cni cnn cno cnr co- coa cob coc cof coi con coo cor cra crb crc crf cri crn cro crr faa fab fac faf fai fan fao far fba fbb fbc fbf fbi fbn fbo fbr fca fcb fcc fcf fci fcn fco fcr ffa ffc fff ffi ffn ffo ffr fia fib fic fif fii fin fir fna fnb fnc fnf fni fnn fnr foa fob foc fof foi fon foo for fra frb frc frf fri frn fro frr i-f ia- iaa iab iac iaf iai ian iao iar iba ibb ibc ibf ibi ibn ibo ibr ica icb icc icf ici icn ico icr ifa ifb ifc iff ifi ifn ifo ifr iia iib iic iif iii iin iio iir in- ina inb inc inf ini inn ino inr io- ioa iob ioc iof ioi ion ioo ior ir- ira irb irc irf iri irn iro irr n-i naa nab nac naf nai nan nao nar nba nbb nbc nbf nbi nbn nbo nbr nca ncb ncc ncf nci ncn nco ncr nfa nfb nfc nff nfi nfn nfo nfr nia nib nic nif nii nin nio nir nna nnb nnc nnf nni nnn nno no- noa nob noc nof noi non noo nor nra nrb nrc nrf nri nrn nro nrr o-i oaa oab oac oaf oai oan oao oar ob- oba obb obc obf obi obn obo obr oc- oca ocb occ ocf oci ocn oco ocr of- ofa ofb ofc off ofi ofn ofo ofr oia oib oic oif oii oin oio oir on- ona onb onc onf oni onn ono onr oo- ooa oob ooc oof ooi oon ooo oor or- ora orb orc orf ori orn oro orr ra- raa rab rac raf rai ran rao rar rba rbb rbc rbf rbi rbn rbo rbr rca rcb rcc rcf rci rcn rco rcr rfa rfb rfc rff rfi rfn rfo rfr ria rib ric rif rii rin rio rir rna rnb rnc rni rnn rno rnr roa rob roc rof roi ron roo ror rra rrb rrc rrf rri rrn rrr

-ana a-ii aaaa aaab aaac aaaf aaai aaan aaar aaba aabb aabc aabi aaca aacb aacc aacf aaci aacn aaco aacr aafa aafb aafc aaff aafi aaib aaic aaii aain aana aani aaon aaoo aara aarc aari aaro abaa abab abac abaf abai aban abar abb- abba abbb abbi abbo abbr abca abcb abcc abcf abci abcn abcr abff abia abib abic abin abir aboa abob abof abon aboo abor abra abrc abri abro acaa acab acac acai acan acar acba acca accc accf acci acco acfc acfi aci- acia acic acif acin acir acoa acon acor acr- acra acrc acri acro acrr afaa afan afao afar afca afcb afcc afci affa affc affi affo afia afib afif afin afir afoa afoo afor afr- afra afrc afri afro aiai aian aiba aibn aibo aica aicc aicf aicr aiff aiia aiib aiic aiin aiir aina ainc aini aino aioc aioi aion aira airi airo ana- anaa anab anac anai anan anao anar anba anbb anbi anbo anca ancc anco anfa anfo ania anib anic anif anin anio anir anna annb anni anno ano- anoa anon anor anrc anri aoba aoca aonb aono aora aorb aorn arab arac araf arai aran arar arba arbi arc- arca arci arco arfa arfb arfc arff aria arib arif arii arin ario arna arni arno aroa arob aroi aron aroo aror arr- arra arrc arri arro arrr ba-i baaa baaf baan baar baba babb babi babo babr bac- baca bacc baci bacn baco bafc baff bafo baia baib baic bain baio bair bana banc bani bann bano banr baon bar- bara barb barc barf bari barn baro barr bbbb bbci bbfc bbfn bbin bbrc bcaa bcar bcbc bcca bccc bcci bcfc bcia bcof bcor bcra bfca biaf bian biao biar biba bibb bibi bibo bica bicc bici bico bifa biff bifi biin bin- bina binc bini binn bino bio- bioc bioi bion bira birb biri birn biro birr bnai bnib bnin bnoc bnor bnrr boab boac boai boan boar boba bobb bobi bobo boca boco bofa boff boi- boii boin bona bonc boni bonn bono boob booc boof boon boor bor- bora borf bori born boro borr brab brac braf brai bran brao brca brcb brfc bria bric brin brio brna brno broa brob broc bron broo bror brrr c-bo caaa caab caac caaf caan caba cabf cabi cabo cac- caca cacc caci caco cacr cafa cafb cafc caff caia caib caic cain caio cair cana canc cani cann cano caoi caor cara carb carc carf cari carn caro carr cbac cbar cbbc cbca cbcc cbcn cbcr cbfb cbfc cbia cbir cbna cbrn ccaa ccab ccac ccaf ccai ccar ccba ccbc ccbn ccca cccb cccc cccf ccci ccfa ccfc ccff ccfi ccic ccii ccir ccna ccnb ccnc ccnf ccni ccnr