-ic a-a a-b a-c a-i a-t aaa aab aac aaf aai aan aao aap aar aat ab- aba abb abc abf abi abn abo abp abr abt ac- aca acb acc acf aci acn aco acp acr act af- afa afb afc aff afi afn afo afp afr aft ai- aia aib aic aif aii ain aio aip air ait an- ana anb anc anf ani ann ano anp anr ant aoa aob aoc aof aoi aon aoo aop aor aot ap- apa apb apc apf api apn apo app apr apt ar- ara arb arc arf ari arn aro arp arr art at- ata atb atc atf ati atn ato atp atr att b-p baa bab bac baf bai ban bao bap bar bat bba bbb bbc bbf bbi bbn bbo bbp bbr bbt bca bcb bcc bcf bci bcn bco bcp bcr bct bfa bfb bfc bff bfi bfn bfo bfp bfr bft bi- bia bib bic bif bii bin bio bip bir bit bna bnb bnc bnf bni bnn bno bnp bnr bnt boa bob boc bof boi bon boo bop bor bot bpa bpb bpc bpf bpi bpn bpo bpp bpr bpt bra brb brf bri brn bro brp brr brt bta btb btc btf bti btn bto btp btr btt c-- caa cab cac caf cai can cao cap car cat cba cbb cbc cbf cbi cbn cbo cbp cbr cbt cca ccb ccc ccf cci ccn cco ccp ccr cct cfa cfb cfc cff cfi cfn cfo cfp cfr cft ci- cia cib cic cif cii cin cio cip cir cit cn- cna cnb cnc cnf cni cnn cno cnp cnr cnt co- coa cob coc cof coi con coo cop cor cot cpa cpb cpc cpf cpi cpn cpo cpp cpr cpt cra crb crc crf cri crn cro crp crr crt cta ctb ctc ctf cti ctn cto ctp ctr ctt faa fab fac faf fai fan fao fap far fat fba fbb fbc fbf fbi fbn fbo fbp fbr fbt fca fcb fcc fcf fci fcn fco fcp fcr fct ffa ffc fff ffi ffn ffo ffp ffr fft fia fib fic fif fii fin fip fir fit fna fnb fnc fnf fni fnn fnp fnr fnt foa fob foc fof foi fon foo fop for fot fpa fpb fpc fpi fpn fpo fpp fpr fpt fra frb frc frf fri frn fro frp frr frt fta ftb ftc ftf fti ftn fto ftp ftr ftt i-f ia- iaa iab iac iaf iai ian iao iap iar iat iba ibb ibc ibf ibi ibn ibo ibp ibr ibt ica icb icc icf ici icn ico icp icr ict ifa ifb ifc iff ifi ifn ifo ifp ifr ift iia iib iic iif iii iin iio iip iir iit in- ina inb inc inf ini inn ino inp inr int io- ioa iob ioc iof ioi ion ioo iop ior iot ipa ipb ipc ipf ipi ipn ipo ipp ipr ipt ir- ira irb irc irf iri irn iro irp irr irt ita itb itc itf iti itn ito itp itt n-i naa nab nac naf nai nan nao nap nar nat nba nbb nbc nbf nbi nbn nbo nbp nbr nbt nca ncb ncc ncf nci ncn nco ncp ncr nct nfa nfb nfc nff nfi nfn nfo nfp nfr nft nia nib nic nif nii nin nio nip nir nit nna nnb nnc nnf nni nnn nno nnp nnt no- noa nob noc nof noi non noo nop nor not npa npb npc npf npi npn npo npp npr npt nra nrb nrc nrf nri nrn nro nrp nrr nrt nta ntb ntc ntf nti ntn nto ntp ntr ntt o-i oaa oab oac oaf oai oan oao oap oar oat ob- oba obb obc obf obi obn obo obp obr obt oc- oca ocb occ ocf oci ocn oco ocp ocr oct of- ofa ofb ofc off ofi ofn ofo ofp ofr oft oia oib oic oif oii oin oio oip oir oit on- ona onb onc onf oni onn ono onp onr ont oo- ooa oob ooc oof ooi oon ooo oop oor oot op- opa opb opc opf opi opn opo opp opr opt or- ora orb orc orf ori orn oro orp orr ort ot- ota otb otc otf oti otn oto otp otr ott p-p paa pab pac paf pai pan pao pap par pat pba pbb pbc pbf pbi pbn pbo pbp pbr pbt pca pcb pcc pcf pci pcn pco pcp pcr pct pfa pfb pfc pff pfi pfn pfo pfp pfr pft pia pib pic pif pii pin pio pip pir pit pn- pna pnb pnc pnf pni pnn pno pnp pnr pnt poa pob poc pof poi pon poo pop por pot ppa ppb ppc ppf ppi ppn ppo ppp ppr ppt pra prb prc prf pri prn pro prp prr prt pt- pta ptb ptc ptf pti ptn pto ptp ptr ptt ra- raa rab rac raf rai ran rao rap rar rat rba rbb rbc rbf rbi rbn rbo rbp rbr rbt rca rcb rcc rcf rci rcn rco rcp rcr rct rfa rfb rfc rff rfi rfn rfo rfp rfr rft ria rib ric rif rii rin rio rip rir rit rna rnb rnc rni rnn rno rnp rnr rnt roa rob roc rof roi ron roo rop ror rot rpa rpb rpc rpf rpi rpn rpo rpp rpr rpt rra rrb rrc rrf rri rrn rrp rrr rrt rta rtb rtc rtf rti rtn rto rtp rtr rtt taa tab tac taf tai tan tao tap tar tat tba tbb tbc tbf tbi tbn tbo tbp tbr tbt tca tcb tcc tcf tci tcn tco tcp tcr tct tfa tfb tfc tff tfi tfn tfo tfp tfr tft tia tib tic tif tii tin tio tip tir tit tna tnb tnc tnf tni tnn tno tnp tnr tnt to- toa tob toc tof toi ton too top