-ic a-a a-b a-c a-i aaa aab aac aai aao aap aar aas aay ab- aba abb abc abi abo abp abr abs aby ac- aca acb acc aci aco acp acr acs acy ai- aia aib aic aii aio aip air ais aiy aoa aob aoc aoi aoo aop aor aos ap- apa apb apc api apo app apr aps apy ar- ara arb arc ari aro arp arr ars ary as- asa asb asc asi aso asp asr ass asy ay- aya ayc ayi ayo ayp ayr ays b-p baa bab bac bai bao bap bar bas bay bba bbb bbc bbi bbo bbp bbr bbs bby bca bcb bcc bci bco bcp bcr bcs bcy bi- bia bib bic bii bio bip bir bis biy boa bob boc boi boo bop bor bos boy bpa bpb bpc bpi bpo bpp bpr bps bpy bra brb bri bro brp brr brs bry bsa bsb bsc bsi bso bsp bsr bss bsy by- bya byc byi byo byp byr bys c-- caa cab cac cai cao cap car cas cay cba cbb cbc cbi cbo cbp cbr cbs cby cca ccb ccc cci cco ccp ccr ccs ci- cia cib cic cii cio cip cir cis co- coa cob coc coi coo cop cor cos coy cpa cpb cpc cpi cpo cpp cpr cps cra crb crc cri cro crp crr crs cry csa csb csc csi cso csp csr css csy cya cyb cyc cyo cyp cyr cys ia- iaa iab iac iai iao iap iar ias iba ibb ibc ibi ibo ibp ibr ibs iby ica icb icc ici ico icp icr ics icy iia iib iic iii iio iip iir iis io- ioa iob ioc ioi ioo iop ior ios ipa ipb ipc ipi ipo ipp ipr ips ipy ir- ira irb irc iri iro irp irr irs iry is- isa isb isc isi iso isp isr iss isy iya iyc iyo iyr iys iyy o-i oaa oab oac oai oao oap oar oas ob- oba obb obc obi obo obp obr obs oby oc- oca ocb occ oci oco ocp ocr ocs oia oib oic oii oio oip oir ois oo- ooa oob ooc ooi ooo oop oor oos op- opa opb opc opi opo opp opr ops opy or- ora orb orc ori oro orp orr ors ory os- osa osb osc osi oso osp osr oss oya oyi oyo oys p-p paa pab pac pai pao pap par pas pay pba pbb pbc pbi pbo pbp pbr pbs pby pca pcb pcc pci pco pcp pcr pcs pia pib pic pii pio pip pir pis poa pob poc poi poo pop por pos poy ppa ppb ppc ppi ppo ppp ppr pps pra prb prc pri pro prp prr prs pry ps- psa psb psc psi pso psp psr pss psy py- pya pyb pyc pyo pyr pys ra- raa rab rac rai rao rap rar ras ray rba rbb rbc rbi rbo rbp rbr rbs rca rcb rcc rci rco rcp rcr rcs ria rib ric rii rio rip rir ris riy roa rob roc roi roo rop ror ros roy rpa rpb rpc rpi rpo rpp rpr rps rra rrb rrc rri rrp rrr rrs rsa rsb rsc rsi rso rsp rsr rss ry- rya ryc ryo ryr rys ryy saa sab sac sai sao sap sar sas say sba sbb sbc sbi sbo sbp sbr sbs sby sca scb scc sci sco scp scr scs sia sib sic sii sio sip sir sis soa sob soc soi soo sop sor sos soy spa spb spc spi spo spp spr sps spy sr- sra srb src sri sro srp srr srs sry ss- ssa ssb ssc ssi sso ssp ssr sss sy- sya syb syc syi syp syr sys yaa yab yac yai yao yap yar yas yay ybc ybi ybp ybr ybs yby yca ycc yci yco ycp ycs ycy yii yio yip yir yis yob yoc yoi yoo yop yor yos yoy ypa ypo yps yra yrc yro yrp yrs ysa ysb ysc ysi yso ysp ysr yss ysy yyb yyc yys yyy