-ic a-a a-b a-c a-i aaa aab aac aai aak aap aar aas aax ab- aba abb abc abi abk abp abr abs abx ac- aca acb acc aci ack acp acr acs acx ai- aia aib aic aii aik aip air ais aix aka akb akc aki akk akp akr aks ap- apa apb apc api apk app apr aps apx ar- ara arb arc ari ark arp arr ars arx as- asa asb asc asi ask asp asr ass asx ax- axa axi axk axp axr axs axx b-p baa bab bac bai bak bap bar bas bax bba bbb bbc bbi bbk bbp bbr bbs bbx bca bcb bcc bci bck bcp bcr bcs bcx bi- bia bib bic bii bik bip bir bis bix bka bkb bkc bkk bkp bkr bks bkx bpa bpb bpc bpi bpp bpr bps bpx bra brb bri brk brp brr brs brx bsa bsb bsc bsi bsk bsp bsr bss bsx bxb bxi bxx c-- caa cab cac cai cak cap car cas cax cba cbb cbc cbi cbk cbp cbr cbs cbx cca ccb ccc cci cck ccp ccr ccs ccx ci- cia cib cic cii cik cip cir cis cix cka ckb ckc cki cks ckx cpa cpb cpc cpi cpk cpp cpr cps cpx cra crb crc cri crk crp crr crs crx csa csb csc csi csk csp csr css csx cxc cxi cxk cxp cxr cxs cxx ia- iaa iab iac iai iap iar ias iba ibb ibc ibi ibk ibp ibr ibs ibx ica icb icc ici ick icp icr ics iia iib iic iii iip iir iis iix ika ikb ikc iki ikk ikr iks ikx ipa ipb ipc ipi ipp ipr ips ipx ir- ira irb irc iri irk irp irr irs irx is- isa isb isc isi isk isp isr iss ixc ixi ka- kaa kab kac kai kak kap kar kas kax kba kbb kbc kbi kbk kbp kbr kbs kbx kca kcb kcc kci kck kcp kcr kcs kcx kia kib kic kii kik kip kir kis kix kkb kkc kki kkk kkp kkr kks kpa kpc kpi kpk kpp kpr kps kra krc kri krk krp krr krs ksa ksb ksc ksi ksk ksp ksr kss p-p paa pab pac pai pak pap par pas pax pba pbb pbc pbi pbk pbp pbr pbs pbx pca pcb pcc pci pck pcp pcr pcs pcx pia pib pic pii pik pip pir pis pix pka pkb pkc pki pkp pkr pks ppa ppb ppc ppi ppk ppp ppr pps ppx pra prb prc pri prk prp prr prs prx ps- psa psb psc psi psk psp psr pss psx pxc pxk pxr pxs ra- raa rab rac rai rak rap rar ras rax rba rbb rbc rbi rbk rbp rbr rbs rbx rca rcb rcc rci rcp rcr rcs rcx ria rib ric rii rik rip rir ris rix rkb rkc rkk rkp rks rpa rpb rpc rpi rpk rpp rpr rps rpx rra rrb rrc rri rrk rrp rrr rrs rsa rsb rsc rsi rsk rsp rsr rss rsx rxp rxr rxs saa sab sac sai sak sap sar sas sax sba sbb sbc sbi sbk sbp sbr sbs sbx sca scb scc sci sck scp scr scs scx sia sib sic sii sik sip sir sis six sk- ska skb skc ski skk skp skr sks skx spa spb spc spi spk spp spr sps spx sr- sra srb src sri srk srp srr srs srx ss- ssa ssb ssc ssi ssk ssp ssr sss ssx sxc sxi sxs xaa xac xak xap xar xas xbc xbr xbx xcb xci xcp xcr xcx xia xic xii xis xix xkb xks xpa xpb xpc xpp xps xrc xrx xsa xsb xsc xsi xsp xss xxi xxp xxx