-ic a-a a-b a-c a-i a-t aaa aab aac aai aan aap aar aat ab- aba abb abc abi abn abp abr abt ac- aca acb acc aci acn acp acr act ai- aia aib aic aii ain aip air ait an- ana anb anc ani ann anp anr ant ap- apa apb apc api apn app apr apt ar- ara arb arc ari arn arp arr art at- ata atb atc ati atn atp atr att b-p baa bab bac bai ban bap bar bat bba bbb bbc bbi bbn bbp bbr bbt bca bcb bcc bci bcn bcp bcr bct bi- bia bib bic bii bin bip bir bit bna bnb bnc bni bnn bnp bnr bnt bpa bpb bpc bpi bpn bpp bpr bpt bra brb bri brn brp brr brt bta btb btc bti btn btp btr btt c-- caa cab cac cai can cap car cat cba cbb cbc cbi cbn cbp cbr cbt cca ccb ccc cci ccn ccp ccr cct ci- cia cib cic cii cin cip cir cit cn- cna cnb cnc cni cnn cnp cnr cnt cpa cpb cpc cpi cpn cpp cpr cpt cra crb crc cri crn crp crr crt cta ctb ctc cti ctn ctp ctr ctt ia- iaa iab iac iai ian iap iar iat iba ibb ibc ibi ibn ibp ibr ibt ica icb icc ici icn icp icr ict iia iib iic iii iin iip iir iit in- ina inb inc ini inn inp inr int ipa ipb ipc ipi ipn ipp ipr ipt ir- ira irb irc iri irn irp irr irt ita itb itc iti itn itp itt n-i naa nab nac nai nan nap nar nat nba nbb nbc nbi nbn nbp nbr nbt nca ncb ncc nci ncn ncp ncr nct nia nib nic nii nin nip nir nit nna nnb nnc nni nnn nnp nnt npa npb npc npi npn npp npr npt nra nrb nrc nri nrn nrp nrr nrt nta ntb ntc nti ntn ntp ntr ntt p-p paa pab pac pai pan pap par pat pba pbb pbc pbi pbn pbp pbr pbt pca pcb pcc pci pcn pcp pcr pct pia pib pic pii pin pip pir pit pn- pna pnb pnc pni pnn pnp pnr pnt ppa ppb ppc ppi ppn ppp ppr ppt pra prb prc pri prn prp prr prt pt- pta ptb ptc pti ptn ptp ptr ptt ra- raa rab rac rai ran rap rar rat rba rbb rbc rbi rbn rbp rbr rbt rca rcb rcc rci rcn rcp rcr rct ria rib ric rii rin rip rir rit rna rnb rnc rni rnn rnp rnr rnt rpa rpb rpc rpi rpn rpp rpr rpt rra rrb rrc rri rrn rrp rrr rrt rta rtb rtc rti rtn rtp rtr rtt taa tab tac tai tan tap tar tat tba tbb tbc tbi tbn tbp tbr tbt tca tcb tcc tci tcn tcp tcr tct tia tib tic tii tin tip tir tit tna tnb tnc tni tnn tnp tnr tnt tpa tpb tpc tpi tpn tpp tpr tpt tra trb trc tri trn trp trr trt tta ttb ttc tti ttn ttp ttr ttt