-ic a-a a-b a-c a-i aaa aab aac aad aai aan aao aar aas ab- aba abb abc abd abi abn abo abr abs ac- aca acb acc acd aci acn aco acr acs ad- ada adb adc add adi adn ado adr ads ai- aia aib aic aid aii ain aio air ais an- ana anb anc and ani ann ano anr ans aoa aob aoc aod aoi aon aoo aor aos ar- ara arb arc ard ari arn aro arr ars as- asa asb asc asd asi asn aso asr ass baa bab bac bad bai ban bao bar bas bba bbb bbc bbd bbi bbn bbo bbr bbs bca bcb bcc bcd bci bcn bco bcr bcs bda bdb bdc bdd bdi bdo bdr bds bi- bia bib bic bid bii bin bio bir bis bna bnb bnc bnd bni bnn bno bnr bns boa bob boc bod boi bon boo bor bos bra brb brd bri brn bro brr brs bsa bsb bsc bsd bsi bsn bso bsr bss c-- caa cab cac cad cai can cao car cas cba cbb cbc cbd cbi cbn cbo cbr cbs cca ccb ccc ccd cci ccn cco ccr ccs cda cdb cdc cdd cdi cdn cdo cdr cds ci- cia cib cic cid cii cin cio cir cis cn- cna cnb cnc cnd cni cnn cno cnr cns co- coa cob coc cod coi con coo cor cos cra crb crc crd cri crn cro crr crs csa csb csc csd csi csn cso csr css daa dab dac dad dai dan dao dar das dba dbb dbc dbd dbi dbn dbo dbr dbs dca dcb dcc dcd dci dcn dco dcr dcs dda ddb ddc ddd ddi ddn ddo ddr dds di- dia dib dic did dii din dio dir dis dna dnb dnc dnd dni dnn dno dnr dns doa dob doc dod doi don doo dor dos dra drb drc drd dri drn dro drr drs dsa dsb dsc dsd dsi dsn dso dsr dss i-d ia- iaa iab iac iad iai ian iao iar ias iba ibb ibc ibd ibi ibn ibo ibr ibs ica icb icc icd ici icn ico icr ics ida idb idc idd idi idn ido idr ids iia iib iic iid iii iin iio iir iis in- ina inb inc ind ini inn ino inr ins io- ioa iob ioc iod ioi ion ioo ior ios ir- ira irb irc ird iri irn iro irr irs is- isa isb isc isd isi isn iso isr iss n-i naa nab nac nad nai nan nao nar nas nba nbb nbc nbd nbi nbn nbo nbr nbs nca ncb ncc ncd nci ncn nco ncr ncs nda ndb ndc ndd ndi ndn ndo ndr nds nia nib nic nid nii nin nio nir nis nna nnb nnc nni nnn nno nns no- noa nob noc nod noi non noo nor nos nra nrb nrc nrd nri nrn nro nrr nrs nsa nsb nsc nsd nsi nsn nso nsr nss o-i oaa oab oac oad oai oan oao oar oas ob- oba obb obc obd obi obn obo obr obs oc- oca ocb occ ocd oci ocn oco ocr ocs oda odb odc odd odi odn odo odr ods oia oib oic oid oii oin oio oir ois on- ona onb onc ond oni onn ono onr ons oo- ooa oob ooc ood ooi oon ooo oor oos or- ora orb orc ord ori orn oro orr ors os- osa osb osc osd osi osn oso osr oss ra- raa rab rac rad rai ran rao rar ras rba rbb rbc rbd rbi rbn rbo rbr rbs rca rcb rcc rcd rci rcn rco rcr rcs rda rdb rdc rdd rdi rdn rdo rdr rds ria rib ric rid rii rin rio rir ris rna rnb rnc rnd rni rnn rno rnr rns roa rob roc rod roi ron roo ror ros rra rrb rrc rrd rri rrn rrr rrs rsa rsb rsc rsd rsi rsn rso rsr rss saa sab sac sad sai san sao sar sas sba sbb sbc sbd sbi sbn sbo sbr sbs sca scb scc scd sci scn sco scr scs sda sdb sdc sdd sdi sdn sdo sdr sds sia sib sic sid sii sin sio sir sis sna snb snc snd sni snn sno snr sns soa sob soc sod soi son soo sor sos sr- sra srb src srd sri srn sro srr srs ss- ssa ssb ssc ssd ssi ssn sso ssr sss