-ic a-a a-b a-c a-i aaa aab aac aai aam aan aao aar ab- aba abb abc abi abm abn abo abr ac- aca acb acc aci acm acn aco acr ai- aia aib aic aii aim ain aio air ama amb amc ami amm amn amo amr an- ana anb anc ani anm ann ano anr aoa aob aoc aoi aom aon aoo aor ar- ara arb arc ari arm arn aro arr baa bab bac bai bam ban bao bar bba bbb bbc bbi bbm bbn bbo bbr bca bcb bcc bci bcm bcn bco bcr bi- bia bib bic bii bim bin bio bir bma bmb bmc bmi bmm bmn bmo bmr bna bnb bnc bni bnn bno bnr boa bob boc boi bom bon boo bor bra brb bri brm brn bro brr c-- caa cab cac cai cam can cao car cba cbb cbc cbi cbm cbn cbo cbr cca ccb ccc cci ccm ccn cco ccr ci- cia cib cic cii cim cin cio cir cma cmb cmc cmi cmm cmn cmo cmr cn- cna cnb cnc cni cnm cnn cno cnr co- coa cob coc coi com con coo cor cra crb crc cri crm crn cro crr ia- iaa iab iac iai iam ian iao iar iba ibb ibc ibi ibm ibn ibo ibr ica icb icc ici icm icn ico icr iia iib iic iii iim iin iio iir im- ima imb imc imi imm imn imo in- ina inb inc ini inm inn ino inr io- ioa iob ioc ioi iom ion ioo ior ir- ira irb irc iri irm irn iro irr m-o m-r maa mab mac mai mam man mao mar mba mbb mbc mbi mbm mbo mbr mc- mca mcb mcc mci mcm mcn mco mcr mi- mia mib mic mii mim min mio mir mma mmb mmc mmi mmm mmn mmo mmr mna mnb mnc mni mnm mnn mno mnr moa mob moc moi mom mon moo mor mra mrb mrc mri mrm mrn mro mrr n-i naa nab nac nai nam nan nao nar nba nbb nbc nbi nbm nbn nbo nbr nca ncb ncc nci ncm ncn nco ncr nia nib nic nii nim nin nio nir nma nmb nmc nmi nmm nmn nmo nmr nna nnb nnc nni nnm nnn nno no- noa nob noc noi nom non noo nor nra nrb nrc nri nrm nrn nro nrr o-i oaa oab oac oai oam oan oao oar ob- oba obb obc obi obm obn obo obr oc- oca ocb occ oci ocm ocn oco ocr oia oib oic oii oim oin oio oir om- oma omb omc omi omm omn omo omr on- ona onb onc oni onn ono onr oo- ooa oob ooc ooi oom oon ooo oor or- ora orb orc ori orm orn oro orr ra- raa rab rac rai ram ran rao rar rba rbb rbc rbi rbm rbn rbo rbr rca rcb rcc rci rcm rcn rco rcr ria rib ric rii rim rin rio rir rma rmb rmc rmi rmm rmn rmo rmr rna rnb rnc rni rnm rnn rno rnr roa rob roc roi rom ron roo ror rra rrb rrc rri rrm rrn rrr