lsb lsc lse lsf lsi lsk lsl lso lsp lsq lsr lss lsu lub luc lue luf lui luk lul luo lup lur lus luu o-i ob- obb obc obe obf obi obk obl obo obp obr obs obu oc- ocb occ ocf oci ock ocl oco ocp ocr ocs ocu oeb oec oee oef oei oel oeo oep oer oes of- ofb ofc ofe off ofi ofl ofo ofp ofr ofs ofu oib oic oie oif oii oik oil oio oip oir ois oiu okb okc oke oki okk okl oko okp okr oks oku olb olc ole olf oli olk oll olo olp ols olu oo- oob ooc oof ooi ook ool ooo oop oor oos op- opb opc ope opf opi opk opl opo opp opq opr ops oqb oqo or- orb orc ore orf ori ork orl oro orp orr ors oru os- osb osc ose osf osi osk osl oso osp osq osr oss osu ou- ouc oue ouf oui ouk oul ouo oup our ous p-p pbb pbc pbe pbf pbi pbk pbl pbo pbp pbr pbs pbu pcb pcc pce pcf pci pck pcl pco pcp pcq pcr pcs pcu peb pec pee pef pei pek pel peo pep per pes peu pfb pfc pfe pff pfi pfk pfl pfo pfp pfr pfs pfu pib pic pie pif pii pik pil pio pip piq pir pis piu pkb pkc pke pkf pki pkl pko pkp pkr pks pku plb plc ple plf pli plk pll plo plp plr pls plu pob poc poe pof poi pok pol poo pop por pos pou ppb ppc ppe ppf ppi ppk ppl ppo ppp ppq ppr pps ppu pqi pqq pqr pqs prb prc pre prf pri prk prl pro prp prq prr prs pru ps- psb psc pse psf psi psk psl pso psp psr pss psu pub puc pue puf pui puk pul pup pur pus puu qbc qbe qbq qbs qcc qci qcl qco qcp qcs qec qee qef qeo qep qfb qfc qfe qff qfi qfs qic qie qik qil qio qip qir qis qiu qki qlf qlp qls qof qoi qoo qop qor qos qpc qpf qpl qpp qpr qps qqk qqq qqu qrb qrc qre qri qrl qrp qrs qru qsc qsi qsl qso qsp qsr qu- que qui qul quo qur qus rbb rbc rbe rbf rbi rbk rbl rbo rbp rbr rbs rbu rcb rcc rce rcf rci rcl rco rcp rcr rcs rcu re- reb rec ree ref rei rek rel reo rep req rer res reu rfb rfc rfe rff rfi rfk rfl rfo rfp rfq rfr rfs rfu rib ric rie rif rii rik ril rio rip riq rir ris rkb rkc rke rkf rkk rko rkp rks rku rlc rle rlf rli rll rlo rlp rlr rls rlu rob roc roe rof roi rok rol roo rop ror ros rou rpb rpc rpe rpf rpi rpk rpl rpo rpp rpr rps rpu rqc rqs rrb rrc rrf rri rrk rrl rrp rrq rrr rrs rru rsb rsc rse rsf rsi rsk rsl rso rsp rsq rsr rss rsu rub ruc rue ruf rui ruk ruo rup rur rus ruu sbb sbc sbe sbf sbi sbk sbl sbo sbp sbq sbr sbs sbu scb scc sce scf sci sck scl sco scp scr scs scu se- seb sec see sef sei sek sel seo sep seq ser ses seu sfb sfc sfe sff sfi sfk sfl sfo sfp sfr sfs sfu sib sic sie sif sii sik sil sio sip siq sir sis siu sk- skb skc ske skf ski skk skl sko skp skq skr sks sku slb slc sle slf sli slk sll slo slp slq slr sls slu sob soc soe sof soi sok sol soo sop soq sor sos sou spb spc spe spf spi spk spl spo spp spq spr sps spu sqi sql sqq sqr sqs sr- srb src sre srf sri srk srl sro srp srq srr srs ss- ssb ssc sse ssf ssi ssk ssl sso ssp ssq ssr sss ssu sub suc sue suf sui suk sul suo sup suq sur sus suu ubb ubc ube ubf ubi ubk ubl ubo ubp ubr ubs ubu ucb ucc uce ucf uci uck ucl uco ucp ucr ucs ucu ueb uec uee uef uei uel uep uer ues ufc ufe uff ufi ufl ufo ufp ufr ufs ufu uib uic uie uif uii uil uio uip uiq uir uis uiu ukb ukc uke ukf uki ukk ukl ukp ukr uku ulb ulc ule ulf uli ulk ull ulo ulp ulr uls ulu uob uoc uoe uok uol uoo uop uor uos up- upb upc upe upf upi upk upo upp upr ups upu ur- urb urc ure urf uri urk url uro urp urr urs uru usb usc use usf usi usk usl uso usp usr uss usu uuc uue uur uus uuu