-er -ol bbb bbc bbe bbl bbm bbo bbr bbt bcb bcc bce bcl bcm bco bcr bct be- beb bec bee bel bem beo ber bet blb blc ble bll blm blo blr blt bmb bmc bme bml bmm bmo bmr bmt bob boc boe bol bom boo bor bot brb bre brl brm bro brr brt btb btc bte btl btm bto btr btt c-- cbb cbc cbe cbl cbm cbo cbr cbt ccb ccc cce ccl ccm cco ccr cct ce- ceb cec cee cel cem ceo cer cet cl- clb clc cle cll clm clo clr clt cmb cmc cme cml cmm cmo cmr cmt co- cob coc coe col com coo cor cot crb crc cre crl crm cro crr crt ctb ctc cte ctl ctm cto ctr ctt ebb ebc ebe ebl ebm ebo ebr ebt ec- ecb ecc ece ecl ecm eco ecr ect eeb eec eee eel eem eeo eer eet elb elc ele ell elm elo elr elt em- emb emc eme eml emm emo emr emt eo- eob eoc eoe eol eom eoo eor eot erb erc ere erl erm ero err ert etb etc ete etl etm eto etr ett lbb lbc lbe lbl lbm lbo lbr lbt lcb lcc lce lcl lcm lco lcr lct leb lec lee lel lem leo ler let llb llc lle lll llm llo llr llt lmb lmc lme lml lmm lmo lmr lmt lob loc loe lol lom loo lor lot lrb lrc lrm lro lrr lrt ltb ltc lte ltl ltm lto ltr ltt m-o m-r mbb mbc mbe mbl mbm mbo mbr mbt mc- mcb mcc mce mcl mcm mco mcr mct meb mec mee mel mem meo mer met mlb mlc mle mll mlm mlo mlr mlt mmb mmc mme mml mmm mmo mmr mmt mob moc moe mol mom moo mor mot mrb mrc mre mrl mrm mro mrr mrt mtb mtc mte mtl mtm mto mtr mtt ob- obb obc obe obl obm obo obr obt oc- ocb occ ocl ocm oco ocr oct oeb oec oee oel oem oeo oer oet olb olc ole oll olm olo olt om- omb omc ome oml omm omo omr omt oo- oob ooc ool oom ooo oor oot or- orb orc ore orl orm oro orr ort ot- otb otc ote otl otm oto otr ott rbb rbc rbe rbl rbm rbo rbr rbt rcb rcc rce rcl rcm rco rcr rct re- reb rec ree rel rem reo rer ret rlc rle rll rlm rlo rlr rlt rmb rmc rme rml rmm rmo rmr rmt rob roc roe rol rom roo ror rot rrb rrc rrl rrm rrr rrt rtb rtc rte rtl rtm rto rtr rtt tbb tbc tbe tbl tbm tbo tbr tbt tcb tcc tce tcl tcm tco tcr tct te- teb tec tee tel tem teo ter tet tlc tle tll tlm tlo tlr tlt tmb tmc tme tml tmm tmo tmr tmt to- tob toc toe tol tom too tor tot trb trc tre trl trm tro trr trt ttb ttc tte ttl ttm tto ttr ttt