-up b-p b-u bbb bbd bbf bbi bbp bbr bbs bbu bdb bdd bdf bdi bdp bdr bds bdu bfb bfd bff bfi bfp bfr bfs bfu bi- bib bid bif bii bip bir bis biu bpb bpd bpf bpi bpp bpr bps bpu brb brd brf bri brp brr brs bru bsb bsd bsf bsi bsp bsr bss bsu bub bud buf bui bup bur bus buu dbb dbd dbf dbi dbp dbr dbs dbu ddb ddd ddf ddi ddp ddr dds ddu dfb dfd dff dfi dfp dfr dfs dfu di- dib did dif dii dip dir dis diu dpb dpd dpf dpi dpp dpr dps dpu drb drd dri drp drr drs dru dsb dsd dsf dsi dsp dsr dss dsu dub dud duf dui dup dur dus fbb fbd fbf fbi fbp fbr fbs fbu fdb fdd fdf fdi fdp fdr fds fdu ffd fff ffi ffp ffr ffs ffu fib fid fif fii fip fir fis fiu fpb fpd fpi fpp fpr fps fpu frb frd frf fri frp frr frs fru fsb fsd fsf fsi fsp fsr fss fsu fub fud fuf fui fup fur fus fuu i-d i-f ibb ibd ibf ibi ibp ibr ibs ibu idb idd idf idi idp idr ids idu ifb ifd iff ifi ifp ifr ifs ifu iib iid iif iii iip iir iis iiu ipb ipd ipf ipi ipp ipr ips ipu ir- irb ird irf iri irp irr irs iru is- isb isd isf isi isp isr iss isu iu- iub iud iui iup iur ius p-p pbb pbd pbf pbi pbp pbr pbs pbu pdb pdd pdf pdi pdp pdr pds pdu pfb pfd pff pfi pfp pfr pfs pfu pib pid pif pii pip pir pis piu ppb ppd ppf ppi ppp ppr pps ppu prb prd prf pri prp prr prs pru ps- psb psd psf psi psp psr pss psu pub pud puf pui pup pur pus puu rbb rbd rbf rbi rbp rbr rbs rbu rdb rdd rdf rdi rdp rdr rds rdu rfb rfd rff rfi rfp rfr rfs rfu rib rid rif rii rip rir ris rpb rpd rpf rpi rpp rpr rps rpu rrb rrd rrf rri rrp rrr rrs rru rsb rsd rsf rsi rsp rsr rss rsu rub rud ruf rui rup rur rus ruu sbb sbd sbf sbi sbp sbr sbs sbu sdb sdd sdf sdi sdp sdr sds sdu sfb sfd sff sfi sfp sfr sfs sfu sib sid sif sii sip sir sis siu spb spd spf spi spp spr sps spu sr- srb srd srf sri srp srr srs ss- ssb ssd ssf ssi ssp ssr sss ssu sub sud suf sui sup sur sus suu ubb ubf ubi ubp ubr ubs ubu udb udd udf udi udp udr uds udu ufd uff ufi ufp ufr ufs ufu uib uid uif uii uip uir uis uiu up- upb upd upf upi upp upr ups upu ur- urb urd urf uri urp urr urs uru usb usd usf usi usp usr uss usu uur uus uuu

bbbb bbbs bbdd bbpr bd-r bdii bdsd bduf bffs bfpp bfsi bfsr bibb bibi bibs bidi bidr bids bidu biff bifi biis bipp bips bipu birb bird biri birr birs biru bis- bisd bisp biss bisu bprd bpsu brds brfu brid bris brrr brrs brsb brsr brud brup brus bsbd bsff bsfs bspp bspr bsrd bssd bsup bubb bubi bubs bubu budb budd budi buds budu buff bufr buid buif buir buis buiu bups bur- burb burd buri burp burr burs buru busi buss busu buus dbfs dbpd dbpf dbrs dbss dbus dddd ddps ddss ddub dfds dfrf dfri dibb dibp dibs didi dids didu dif- diff difs diii diis dipp dips dipu dird dirr dirs dis- disd disi disp diss dius dpsd dpsu drib drif drip drrs drsp drub drui drup drus druu dsdp dsdr dsif dsip dspf dsps dsri dsrp dsrr dssi dssp dub- dubb dubs dubu dudd duds dudu duff dufu duid duif duir duis duri duru dusi duur fbis fbrs fbsd fbus ffff ffii ffps ffrr ffss fibp fibs fidf fids fiff fifi fiii fipp fips firs fisd fisi fiss fisu fprf frib frid frip fris frpd frps frsb frub fsfi fspf fssf fssp fubb fubs fubu fudd fudi fuff fufu fuid fuir fur- furi furr furs fusd fusi fuss fusu ibfi ibid ibis ibrd ibri ibsf ibss ibus idfp idid idir idis idps idrf idsf idss idub idus ifbb ifid ifis ifps ifrb ifrf ifri ifsb ifsp iiii iiis iipf iirs iisd iisi iisp iisr iisu ipdi ipid ippf ippr ipri ipsi ipsp ipss ipur ipus irbp irdp irds irfu iri- irid irip iris irps irri irrs irsf irsp irus isbd isdb isds isfp isis ispf ispr isps isri isrp issf issi issp issr isss issu isup isus iuds iuiu iupp iusd iuss pbrf pbrs pbsp pdbs pdfs pdpr pdrs pdsd pdss pfff pffr pfis pfps pfui pibb pibi pids piff pifs piip pipi pipp pips piri pirr pirs piru pisd pisi piss pisu pius ppds ppib ppid ppif pppd pppp ppps pprf ppru ppsf ppss ppur prbs prfs pri- prid prif prii pris prpd prps prrd prri prrs prsd prsi prss prud pruf prus pruu psbd psbr psdi psdp psdr psds psfs psid psip psis pspi pspp pspr psps psrd psrp pubs pubu puds pudu puff puid puir puis puiu pupi pups pupu pur- purb puri purp purr purs puru pusd pusi puss rbbb rbbr rbbs rbds rbis rbsd rbsp rbss rdbp rfdi rfds rfid rib- ribs ribu ridd ridi rids riff rifs rifu riif riis ripd ripi ripp ripr rips riri rirs risd risi risp riss risu rius rpdp rpii rpps rrif rrrr rrsp rsbi rsdd rsds rsid rsis rspb rsps rubb rubi rubp rubs rubu rudd rudi rudp ruds ruff ruid ruif ruis rupp rurd ruri rurp rurs ruru rusi russ rusu ruud s-ib s-ii sbbs sbds sbsd sbsi sbsp sbus sdds sdib sdif sdpr sdps sdrs sdsf sdss