-ic a-a a-b a-c a-i aaa aab aac aai aao aar aas aav ab- aba abb abc abi abo abr abs abv ac- aca acb acc aci aco acr acs acv ai- aia aib aic aii aio air ais aiv aoa aob aoc aoi aoo aor aos aov ar- ara arb arc ari aro arr ars arv as- asa asb asc asi aso asr ass asv av- ava avb avc avi avo avr avs baa bab bac bai bao bar bas bav bba bbb bbc bbi bbo bbr bbs bca bcb bcc bci bco bcr bcs bcv bi- bia bib bic bii bio bir bis biv boa bob boc boi boo bor bos bov bra brb bri bro brr brs brv bsa bsb bsc bsi bso bsr bss bsv bva bvb bvc bvi bvo bvr bvs bvv c-- caa cab cac cai cao car cas cav cba cbb cbc cbi cbo cbr cbs cbv cca ccb ccc cci cco ccr ccs ccv ci- cia cib cic cii cio cir cis civ co- coa cob coc coi coo cor cos cov cra crb crc cri cro crr crs crv csa csb csc csi cso csr css csv cva cvb cvc cvi cvo cvr cvs cvv i-v ia- iaa iab iac iai iao iar ias iav iba ibb ibc ibi ibo ibr ibs ibv ica icb icc ici ico icr ics icv iia iib iic iii iio iir iis io- ioa iob ioc ioi ioo ior ios iov ir- ira irb irc iri iro irr irs irv is- isa isb isc isi iso isr iss isv iva ivb ivc ivi ivo ivr ivs ivv o-i oaa oab oac oai oao oar oas oav ob- oba obb obc obi obo obr obs obv oc- oca ocb occ oci oco ocr ocs ocv oia oib oic oii oio oir ois oiv oo- ooa oob ooc ooi ooo oor oos oov or- ora orb orc ori oro orr ors orv os- osa osb osc osi oso osr oss osv ov- ova ovb ovc ovi ovo ovs ovv ra- raa rab rac rai rao rar ras rav rba rbb rbc rbi rbo rbr rbs rca rcb rcc rci rco rcr rcs rcv ria rib ric rii rio rir ris riv roa rob roc roi roo ror ros rov rra rrb rrc rri rrr rrs rsa rsb rsc rsi rso rsr rss rsv rva rvb rvc rvi rvo rvr rvs rvv saa sab sac sai sao sar sas sav sba sbb sbc sbi sbo sbr sbs sbv sca scb scc sci sco scr scs scv sia sib sic sii sio sir sis siv soa sob soc soi soo sor sos sov sr- sra srb src sri sro srr srs srv ss- ssa ssb ssc ssi sso ssr sss ssv sva svb svc svi svo svr svs svv v-a vaa vab vac vai vao var vas vav vba vbc vbi vbo vbr vbs vbv vca vcc vci vco vcr vcs vi- via vib vic vii vio vir vis viv voa vob voc voi voo vor vos vov vra vrb vrc vri vrr vrs vsa vsb vsc vsi vso vsr vss vsv vva vvb vvc vvi vvo vvr vvs vvv