-up b-p b-u bbb bbd bbi bbp bbr bbs bbt bbu bdb bdd bdi bdp bdr bds bdt bdu bi- bib bid bii bip bir bis bit biu bpb bpd bpi bpp bpr bps bpt bpu brb brd bri brp brr brs brt bru bsb bsd bsi bsp bsr bss bst bsu btb btd bti btp btr bts btt btu bub bud bui bup bur bus but buu dbb dbd dbi dbp dbr dbs dbt dbu ddb ddd ddi ddp ddr dds ddt ddu di- dib did dii dip dir dis dit diu dpb dpd dpi dpp dpr dps dpt dpu drb drd dri drp drr drs drt dru dsb dsd dsi dsp dsr dss dst dsu dtb dtd dti dtp dtr dts dtt dtu dub dud dui dup dur dus dut i-d ibb ibd ibi ibp ibr ibs ibt ibu idb idd idi idp idr ids idt idu iib iid iii iip iir iis iit iiu ipb ipd ipi ipp ipr ips ipt ipu ir- irb ird iri irp irr irs irt iru is- isb isd isi isp isr iss ist isu itb itd iti itp its itt itu iu- iub iud iui iup iur ius iut p-p pbb pbd pbi pbp pbr pbs pbt pbu pdb pdd pdi pdp pdr pds pdt pdu pib pid pii pip pir pis pit piu ppb ppd ppi ppp ppr pps ppt ppu prb prd pri prp prr prs prt pru ps- psb psd psi psp psr pss pst psu pt- ptb ptd pti ptp ptr pts ptt ptu pub pud pui pup pur pus put puu rbb rbd rbi rbp rbr rbs rbt rbu rdb rdd rdi rdp rdr rds rdt rdu rib rid rii rip rir ris rit rpb rpd rpi rpp rpr rps rpt rpu rrb rrd rri rrp rrr rrs rrt rru rsb rsd rsi rsp rsr rss rst rsu rtb rtd rti rtp rtr rts rtt rtu rub rud rui rup rur rus rut ruu sbb sbd sbi sbp sbr sbs sbt sbu sdb sdd sdi sdp sdr sds sdt sdu sib sid sii sip sir sis sit siu spb spd spi spp spr sps spt spu sr- srb srd sri srp srr srs srt ss- ssb ssd ssi ssp ssr sss sst ssu stb std sti stp str sts stt stu sub sud sui sup sur sus sut suu tbb tbd tbi tbp tbr tbs tbt tbu tdb tdd tdi tdp tdr tds tdt tdu tib tid tii tip tir tis tit tiu tpb tpd tpi tpp tpr tps tpt tpu trb trd tri trp trr trs trt tru tsb tsd tsi tsp tsr tss tst tsu ttb ttd tti ttp ttr tts ttt ttu tub tud tui tup tur tus tut tuu ubb ubi ubp ubr ubs ubt ubu udb udd udi udp udr uds udt udu uib uid uii uip uir uis uit uiu up- upb upd upi upp upr ups upt upu ur- urb urd uri urp urr urs urt uru usb usd usi usp usr uss ust usu utb utd uti utp utr uts utt utu uur uus uut uuu

bbbb bbbs bbdd bbpr bd-r bdii bdsd bibb bibi bibs bidi bidr bids bidu biis bipp bips bipu birb bird biri birr birs birt biru bis- bisd bisp biss bist bisu bitd bits bitt bitu bprd bpsu bpti brds brdt brid bris brit brrr brrs brsb brsr brst brud brup brus brut bsbd bspp bspr bsrd bssd bsts bsup btbp btdt btps btrt btss bttb btus bubb bubi bubs bubu budb budd budi buds budu buid buir buis buit buiu bups bur- burb burd buri burp burr burs burt buru busi buss bust busu but- buti buts butt buus dbit dbpd dbrs dbss dbtt dbus dddd ddps ddss ddts ddub dibb dibp dibs didi dids didu diii diis dipp dips dipt dipu dird dirr dirs dirt dis- disd disi disp diss dist diti dits ditt dius dpdt dpsd dpst dpsu dpts drib drip drit drrs drsp drub drui drup drus drut druu dsdp dsdr dsip dsps dspt dsri dsrp dsrr dssi dssp dsst dsts dtdp dtss dttp dub- dubb dubs dubu dudd duds dudu duid duir duis duit duri durt duru dusi dust dutp duts duur duut ibid ibis ibrd ibri ibss ibtb ibts ibus idid idir idis idps idss idtp idts idub idus iiii iiis iiit iirs iisd iisi iisp iisr iist iisu iitr iitt ipdi ipid ippr ipri ipsi ipsp ipss ipts ipur ipus iput irbp irdp irds iri- irid irip iris irps irri irrs irsp irti irtp irts irus isbd isbt isdb isds isis isit ispr isps isri isrp issi issp issr isss issu istd isti istp istr ists isup isus itbs itis itri itrs itsi itsp itsu itup itur iuds iuiu iupp iusd iuss iust pbrs pbsp pdbs pdpr pdrs pdsd pdss pibb pibi pids piip pipi pipp pips piri pirr pirs piru pisd pisi piss pist pisu piti pitr pits pitt pitu pius ppds ppib ppid pppd pppp ppps ppru ppss ppts pptt ppur prbs pri- prid prii pris prpd prps prrd prri prrs prsd prsi prss prti prtp prtr prud prus prut pruu psbd psbr psbt psdi psdp psdr psds psid psip psis pspi pspp pspr psps psrd psrp psst psts pstu ptpd ptrd ptsd ptui pubs pubu puds pudu puid puir puis puit puiu pupi pups pupu pur- purb puri purp purr purs puru pusd pusi puss pust put- puti puts putt putu rbbb rbbr rbbs rbds rbis rbsd rbsp rbss rbst rdbp rib- ribs ribu ridd ridi rids riis ripd ripi ripp ripr rips ript riri rirs risd risi risp riss rist risu riti rits ritt ritu rius rpdp rpii rpps rptd rpts rrrr rrsp rsbi rsdd rsds rsid rsis rspb rsps rstp rsts rstu rtdt rtps rtss rttp rtts rubb rubi rubp rubs rubu rudd rudi rudp ruds ruid ruis ruit rupp rupt rurd ruri rurp rurs ruru rusi russ rust rusu ruti ruts rutt rutu ruud s-ib s-ii sbbs sbds sbsd sbsi