-er -ol bbb bbe bbl bbn bbo bbr bbt be- beb bee bel ben beo ber bet blb ble bll bln blo blr blt bnb bne bnl bnn bno bnr bnt bob boe bol bon boo bor bot brb bre brl brn bro brr brt btb bte btl btn bto btr btt ebb ebe ebl ebn ebo ebr ebt eeb eee eel een eeo eer eet elb ele ell eln elo elr elt en- enb ene enl enn eno enr ent eo- eob eoe eol eon eoo eor eot erb ere erl ern ero err ert etb ete etl etn eto etr ett lbb lbe lbl lbo lbr lbt leb lee lel len leo ler let llb lle lll lln llo llr llt lnb lne lnl lnn lno lnr lnt lob loe lol lon loo lor lot lrb lrn lro lrr lrt ltb lte ltl lto ltr ltt nbb nbe nbl nbn nbo nbr nbt ne- neb nee nel nen neo ner net nlb nle nll nln nlo nlr nlt nnb nne nnl nnn nno nnt no- nob noe nol non noo nor not nrb nre nrl nrn nro nrr nrt ntb nte ntn nto ntr ntt ob- obb obe obl obn obo obr obt oeb oee oel oen oeo oer oet olb ole oll oln olo olt on- onb one onl onn ono onr ont oo- oob ool oon ooo oor oot or- orb ore orl orn oro orr ort ot- otb ote otl otn oto otr ott rbb rbe rbl rbn rbo rbr rbt re- reb ree rel ren reo rer ret rle rll rln rlo rlr rlt rnb rnn rno rnr rnt rob roe rol ron roo ror rot rrb rrl rrn rrr rrt rtb rte rtl rtn rto rtr rtt tbb tbe tbl tbn tbo tbr tbt te- teb tee tel ten teo ter tet tle tll tln tlo tlr tlt tnb tne tnl tnn tno tnr tnt to- tob toe tol ton too tor tot trb tre trl trn tro trr trt ttb tte ttl ttn tto ttr ttt