-er -up b-p b-u bbb bbd bbe bbi bbp bbr bbs bbt bbu bdb bdd bde bdi bdp bdr bds bdt bdu be- beb bed bee bei bep ber bes bet beu bi- bib bid bie bii bip bir bis bit biu bpb bpd bpe bpi bpp bpr bps bpt bpu brb brd bre bri brp brr brs brt bru bsb bsd bse bsi bsp bsr bss bst bsu btb btd bte bti btp btr bts btt btu bub bud bue bui bup bur bus but buu dbb dbd dbe dbi dbp dbr dbs dbt dbu ddb ddd dde ddi ddp ddr dds ddt ddu de- deb ded dee dei dep der des det deu di- dib did die dii dip dir dis dit diu dpb dpd dpe dpi dpp dpr dps dpt dpu drb drd dre dri drp drr drs drt dru dsb dsd dse dsi dsp dsr dss dst dsu dtb dtd dte dti dtp dtr dts dtt dtu dub dud due dui dup dur dus dut ebb ebd ebe ebi ebp ebr ebs ebt ebu ed- edb edd ede edi edp edr eds edt edu eeb eed eee eep eer ees eet eib eid eie eii eip eir eis eit eiu ep- epb epd epe epi epp epr eps ept epu erb erd ere eri erp err ers ert eru es- esb esd ese esi esp esr ess est esu etb etd ete eti etp etr ets ett etu eu- eub eud eue eui eup eur eus eut i-d ibb ibd ibe ibi ibp ibr ibs ibt ibu idb idd ide idi idp idr ids idt idu ie- ied iee iei iep ier ies iet iib iid iie iii iip iir iis iit iiu ipb ipd ipe ipi ipp ipr ips ipt ipu ir- irb ird ire iri irp irr irs irt iru is- isb isd ise isi isp isr iss ist isu itb itd ite iti itp its itt itu iu- iub iud iue iui iup iur ius iut p-p pbb pbd pbe pbi pbp pbr pbs pbt pbu pdb pdd pde pdi pdp pdr pds pdt pdu peb ped pee pei pep per pes pet peu pib pid pie pii pip pir pis pit piu ppb ppd ppe ppi ppp ppr pps ppt ppu prb prd pre pri prp prr prs prt pru ps- psb psd pse psi psp psr pss pst psu pt- ptb ptd pte pti ptp ptr pts ptt ptu pub pud pue pui pup pur pus put puu rbb rbd rbe rbi rbp rbr rbs rbt rbu rdb rdd rde rdi rdp rdr rds rdt rdu re- reb red ree rei rep rer res ret reu rib rid rie rii rip rir ris rit rpb rpd rpe rpi rpp rpr rps rpt rpu rrb rrd rri rrp rrr rrs rrt rru rsb rsd rse rsi rsp rsr rss rst rsu rtb rtd rte rti rtp rtr rts rtt rtu rub rud rue rui rup rur rus rut ruu sbb sbd sbe sbi sbp sbr sbs sbt sbu sdb sdd sde sdi sdp sdr sds sdt sdu se- seb sed see sei sep ser ses set seu sib sid sie sii sip sir sis sit siu spb spd spe spi spp spr sps spt spu sr- srb srd sre sri srp srr srs srt ss- ssb ssd sse ssi ssp ssr sss sst ssu stb std ste sti stp str sts stt stu sub sud sue sui sup sur sus sut suu tbb tbd tbe tbi tbp tbr tbs tbt tbu tdb tdd tde tdi tdp tdr tds tdt tdu te- teb ted tee tei tep ter tes tet teu tib tid tie tii tip tir tis tit tiu tpb tpd tpe tpi tpp tpr tps tpt tpu trb trd tre tri trp trr trs trt tru tsb tsd tse tsi tsp tsr tss tst tsu ttb ttd tte tti ttp ttr tts ttt ttu tub tud tue tui tup tur tus tut tuu ubb ube ubi ubp ubr ubs ubt ubu udb udd ude udi udp udr uds udt udu ueb ued uee uei uep uer ues uet uib uid uie uii uip uir uis uit uiu up- upb upd upe upi upp upr ups upt upu ur- urb urd ure uri urp urr urs urt uru usb usd use usi usp usr uss ust usu utb utd ute uti utp utr uts utt utu uue uur uus uut uuu