a-a a-b a-c aaa aab aac aah aao aap aar aas aay ab- aba abb abc abh abo abp abr abs aby ac- aca acb acc ach aco acp acr acs acy aha ahb ahc ahh aho ahp ahr ahs ahy aoa aob aoc aoh aoo aop aor aos ap- apa apb apc aph apo app apr aps apy ar- ara arb arc arh aro arp arr ars ary as- asa asb asc ash aso asp asr ass asy ay- aya ayc ayh ayo ayp ayr ays b-p baa bab bac bah bao bap bar bas bay bba bbb bbc bbh bbo bbp bbr bbs bby bca bcb bcc bch bco bcp bcr bcs bcy bha bhb bhc bhh bho bhp bhr bhs boa bob boc boh boo bop bor bos boy bpa bpb bpc bph bpo bpp bpr bps bpy bra brb brh bro brp brr brs bry bsa bsb bsc bsh bso bsp bsr bss bsy by- bya byc byh byo byp byr bys c-- caa cab cac cah cao cap car cas cay cba cbb cbc cbh cbo cbp cbr cbs cby cca ccb ccc cch cco ccp ccr ccs ch- cha chb chc chh cho chp chr chs chy co- coa cob coc coh coo cop cor cos coy cpa cpb cpc cph cpo cpp cpr cps cra crb crc crh cro crp crr crs cry csa csb csc csh cso csp csr css csy cya cyb cyc cyo cyp cyr cys haa hab hac hah hao hap har has hay hba hbb hbc hbh hbo hbp hbr hbs hby hca hcb hcc hch hco hcp hcr hcs hcy hha hhb hhc hhh hho hhp hhr hhs hhy hoa hob hoc hoh hoo hop hor hos hoy hpa hpb hpc hph hpo hpp hpr hps hpy hr- hra hrb hrc hrh hro hrp hrr hrs hsa hsb hsc hsh hsp hsr hss hsy hy- hya hyb hyc hyh hyo hyp hyr hys hyy oaa oab oac oah oao oap oar oas ob- oba obb obc obh obo obp obr obs oby oc- oca ocb occ och oco ocp ocr ocs oha ohc ohh oho ohp ohr ohs oo- ooa oob ooc ooh ooo oop oor oos op- opa opb opc oph opo opp opr ops opy or- ora orb orc orh oro orp orr ors ory os- osa osb osc osh oso osp osr oss oya oyo oys p-p paa pab pac pah pao pap par pas pay pba pbb pbc pbo pbp pbr pbs pby pca pcb pcc pch pco pcp pcr pcs pha phb phc pho php phr phs phy poa pob poc poh poo pop por pos poy ppa ppb ppc pph ppo ppp ppr pps pra prb prc prh pro prp prr prs pry ps- psa psb psc psh pso psp psr pss psy py- pya pyb pyc pyo pyr pys ra- raa rab rac rah rao rap rar ras ray rba rbb rbc rbh rbo rbp rbr rbs rca rcb rcc rch rco rcp rcr rcs rh- rha rhb rhc rhh rho rhp rhr rhs roa rob roc roh roo rop ror ros roy rpa rpb rpc rph rpo rpp rpr rps rra rrb rrc rrh rrp rrr rrs rsa rsb rsc rsh rso rsp rsr rss ry- rya ryc ryo ryr rys ryy saa sab sac sah sao sap sar sas say sba sbb sbc sbh sbo sbp sbr sbs sby sca scb scc sch sco scp scr scs sh- sha shb shc shh sho shp shr shs shy soa sob soc soh soo sop sor sos soy spa spb spc sph spo spp spr sps spy sr- sra srb src srh sro srp srr srs sry ss- ssa ssb ssc ssh sso ssp ssr sss sy- sya syb syc syh syp syr sys yaa yab yac yah yao yap yar yas yay ybc ybp ybr ybs yby yca ycc ych yco ycp ycs ycy yha yhc yhs yob yoc yoo yop yor yos yoy ypa ypo yps yra yrc yro yrp yrs ysa ysb ysc yso ysp ysr yss ysy yyb yyc yys yyy