-er -ol bbb bbe bbi bbl bbm bbo bbr bbs bbt be- beb bee bei bel bem beo ber bes bet bi- bib bie bii bil bim bio bir bis bit blb ble bli bll blm blo blr bls blt bmb bme bmi bml bmm bmo bmr bms bmt bob boe boi bol bom boo bor bos bot brb bre bri brl brm bro brr brs brt bsb bse bsi bsl bsm bso bsr bss bst btb bte bti btl btm bto btr bts btt ebb ebe ebi ebl ebm ebo ebr ebs ebt eeb eee eel eem eeo eer ees eet eib eie eii eil eim eio eir eis eit elb ele eli ell elm elo elr els elt em- emb eme emi eml emm emo emr ems emt eo- eob eoe eoi eol eom eoo eor eos eot erb ere eri erl erm ero err ers ert es- esb ese esi esl esm eso esr ess est etb ete eti etl etm eto etr ets ett ibb ibe ibi ibl ibm ibo ibr ibs ibt ie- iee iei iel iem ier ies iet iib iie iii iil iim iio iir iis iit il- ilb ile ili ill ilm ilo ilr ils ilt im- imb ime imi iml imm imo ims imt io- iob ioe ioi iol iom ioo ior ios iot ir- irb ire iri irl irm iro irr irs irt is- isb ise isi isl ism iso isr iss ist itb ite iti itl itm ito its itt lbb lbe lbi lbl lbm lbo lbr lbs lbt leb lee lei lel lem leo ler les let lib lie lii lil lim lio lir lis lit llb lle lli lll llm llo llr lls llt lmb lme lmi lml lmm lmo lmr lms lmt lob loe loi lol lom loo lor los lot lrb lri lrm lro lrr lrs lrt lsb lse lsi lsl lsm lso lsr lss lst ltb lte lti ltl ltm lto ltr lts ltt m-o m-r mbb mbe mbi mbl mbm mbo mbr mbs mbt meb mee mei mel mem meo mer mes met mi- mib mie mii mil mim mio mir mis mit mlb mle mli mll mlm mlo mlr mls mlt mmb mme mmi mml mmm mmo mmr mms mmt mob moe moi mol mom moo mor mos mot mrb mre mri mrl mrm mro mrr mrs mrt msb mse msi msl msm mso msr mss mst mtb mte mti mtl mtm mto mtr mts mtt o-i ob- obb obe obi obl obm obo obr obs obt oeb oee oei oel oem oeo oer oes oet oib oie oii oil oim oio oir ois oit olb ole oli oll olm olo ols olt om- omb ome omi oml omm omo omr oms omt oo- oob ooi ool oom ooo oor oos oot or- orb ore ori orl orm oro orr ors ort os- osb ose osi osl osm oso osr oss ost ot- otb ote oti otl otm oto otr ots ott rbb rbe rbi rbl rbm rbo rbr rbs rbt re- reb ree rei rel rem reo rer res ret rib rie rii ril rim rio rir ris rit rle rli rll rlm rlo rlr rls rlt rmb rme rmi rml rmm rmo rmr rms rmt rob roe roi rol rom roo ror ros rot rrb rri rrl rrm rrr rrs rrt rsb rse rsi rsl rsm rso rsr rss rst rtb rte rti rtl rtm rto rtr rts rtt sbb sbe sbi sbl sbm sbo sbr sbs sbt se- seb see sei sel sem seo ser ses set sib sie sii sil sim sio sir sis sit slb sle sli sll slm slo slr sls slt smb sme smi sml smm smo smr sms smt sob soe soi sol som soo sor sos sot sr- srb sre sri srl srm sro srr srs srt ss- ssb sse ssi ssl ssm sso ssr sss sst stb ste sti stl stm sto str sts stt tbb tbe tbi tbl tbm tbo tbr tbs tbt te- teb tee tei tel tem teo ter tes tet tib tie tii til tim tio tir tis tit tle tli tll tlm tlo tlr tls tlt tmb tme tmi tml tmm tmo tmr tms tmt to- tob toe toi tol tom too tor tos tot trb tre tri trl trm tro trr trs trt tsb tse tsi tsl tsm tso tsr tss tst ttb tte tti ttl ttm tto ttr tts ttt