a-a a-b aaa aab aaf aao aap aar aas ab- aba abb abf abo abp abr abs af- afa afb aff afo afp afr afs aoa aob aof aoo aop aor aos ap- apa apb apf apo app apr aps ar- ara arb arf aro arp arr ars as- asa asb asf aso asp asr ass b-p baa bab baf bao bap bar bas bba bbb bbf bbo bbp bbr bbs bfa bfb bff bfo bfp bfr bfs boa bob bof boo bop bor bos bpa bpb bpf bpo bpp bpr bps bra brb brf bro brp brr brs bsa bsb bsf bso bsp bsr bss faa fab faf fao fap far fas fba fbb fbf fbo fbp fbr fbs ffa fff ffo ffp ffr ffs foa fob fof foo fop for fos fpa fpb fpo fpp fpr fps fra frb frf fro frp frr frs fsa fsb fsf fso fsp fsr fss oaa oab oaf oao oap oar oas ob- oba obb obf obo obp obr obs of- ofa ofb off ofo ofp ofr ofs oo- ooa oob oof ooo oop oor oos op- opa opb opf opo opp opr ops or- ora orb orf oro orp orr ors os- osa osb osf oso osp osr oss p-p paa pab paf pao pap par pas pba pbb pbf pbo pbp pbr pbs pfa pfb pff pfo pfp pfr pfs poa pob pof poo pop por pos ppa ppb ppf ppo ppp ppr pps pra prb prf pro prp prr prs ps- psa psb psf pso psp psr pss ra- raa rab raf rao rap rar ras rba rbb rbf rbo rbp rbr rbs rfa rfb rff rfo rfp rfr rfs roa rob rof roo rop ror ros rpa rpb rpf rpo rpp rpr rps rra rrb rrf rrp rrr rrs rsa rsb rsf rso rsp rsr rss saa sab saf sao sap sar sas sba sbb sbf sbo sbp sbr sbs sfa sfb sff sfo sfp sfr sfs soa sob sof soo sop sor sos spa spb spf spo spp spr sps sr- sra srb srf sro srp srr srs ss- ssa ssb ssf sso ssp ssr sss

aaaa aaab aaaf aaap aaar aaas aaba aabb aabp aafa aafb aaff aaoo aapa aapo aaps aara aaro aarp aars aasa aasf aass abaa abab abaf abap abar abas abb- abba abbb abbo abbr abbs abff aboa abob abof aboo abor abos abpa abpp abpr abps abra abro abrs abs- absa absf absp abss afaa afao afap afar afbs affa affo affs afoa afoo afor afpa afr- afra afro afrs afsa afsb afsp aoba aopo aora aorb aors aosp aoss apao apap apar apas apba apbr apbs apfa apfo apo- apof apoo apop apor apos appa appr apps apra apro aprs apsa apso apss arab araf arap arar aras arba arbs arfa arfb arff arfs aroa arob aroo aror aros arpa arps arr- arra arro arrr arrs ars- arsa arso asaa asab asaf asao asap asar asas asba asbo asfa asob asof asop asor asos aspa aspo aspr asps asra asro asrs assa asso assp assr asss baaa baaf baar baas baba babb babo babr babs baff bafo baos bapa bapp baps bar- bara barb barf baro barr bars basa basf baso bass bbas bbbb bbbs bbpr bfas bffs bfpo bfpp bfsr boab boar boas boba bobb bobo bobs bofa boff bofs boob boof boop boor boos bopa bopp bops bor- bora borf boro borr bors bosa boso boss bpsa brab braf brao bras broa brob broo bror bros brrr brrs brsb brsr bsaa bsap bsas bsfa bsff bsfs bsos bspp bspr bsra faaa faap faas faba fabo fabs fafa faff fafo fapa fapp faps fara farb faro farp farr fars fasa faso fass fbar fbop fbrs ffar ffff ffps ffrr ffsa ffss foaf foar foba fobs fofo foof foos fopp fops for- fora forb foro forr fors fosa fosb foso foss fpaa fpas fpra fprf frab frap fras frob frop fros frps frsb frso fsas fsfo fspf fsra fssa fssf fssp oafo oafs oaps oara oars oass obas obba obbo obor obos obra obro obsr obss ofas off- offa offo offr offs ofor ofra ooaa ooba ooff oofs oooo ooos oops oora oosa opap opar opo- opor opos oppa oppo opps opra opsa orab orao orar oras orba orbb orbo orbs orff orfs oro- orof oror oros orps orra orro orrs orsa orso osaf osap osar osas osba osbp osfa osoo osor osos osro ossa ossb osso paap paar paas paba pafa paff paos papa papb papp papr paps par- para parf paro parp parr pars pasa paso pasp pass pbar pbpa pbrf pbrs pbsa pbsp pfaa pfas pfff pffr pfps pfra poar poas poba pobo pobs poff poof poop poor poos pop- popa popo popp pops pora porb poro porr pors posa posb poso poss ppap ppar ppfa ppoa ppos pppa pppo pppp ppps pprf ppsf ppss prao prar pras prbs prfs pro- proa prob prof proo prop pros prps prrs prsa prso prss psap psas psbr psfs psoa psos pspp pspr psps psrp pssa psso raab raaf raas raba rabb rabo rabs rafa raff raob raop raos rapa rapp raps rara rarb rarf raro rars rasa raso rasp rass rbaf rbbb rbbr rbbs rbsp rbss roab roaf roap roar roas rob- roba robb robo robs roff rofo roob roof roop roor roos ropa ropo rops rora roro rosa roso rosp ross rpob rpof rpos rpps rras rrrr rrsp rsaa rsaf rsos rspb rspo rsps rssa s-os saab saaf saap saar saas saba sabb sabo sabr sabs safa safb saff safo safr saor saos sapa sapo sapp saps sara sarf saro sarp sarr sars sasa sasf saso sass sbaa sbar sbas sbbs sbor sbsa sbsp sfar sfas sfba sfor sfos sfpa sfra sfro sfss soap soar soas soba sobo sobp sobr sobs sofa sofo soof soop soor soos sopa sopo sopp sops sora sorb soro sorr sors sosa soso soss sp-a spap spar spas spfs spoo spop spor spos