-er -ol -th b-u bbb bbc bbe bbh bbk bbl bbo bbr bbt bbu bcb bcc bce bch bck bcl bco bcr bct bcu be- beb bec bee beh bek bel beo ber bet beu bhb bhc bhe bhh bhk bhl bho bhr bht bhu bkb bkc bke bkk bkl bko bkr bkt blb blc ble blh blk bll blo blr blt blu bob boc boe boh bok bol boo bor bot bou brb bre brh brk brl bro brr brt bru btb btc bte bth btk btl bto btr btt btu bub buc bue buh buk bul buo bur but buu c-- cbb cbc cbe cbh cbk cbl cbo cbr cbt cbu ccb ccc cce cch cck ccl cco ccr cct ccu ce- ceb cec cee ceh cek cel ceo cer cet ceu ch- chb chc che chh chk chl cho chr cht chu ckb ckc ckh cko ckt cl- clb clc cle clh clk cll clo clr clt clu co- cob coc coe coh cok col coo cor cot cou crb crc cre crh crk crl cro crr crt cru ctb ctc cte cth ctk ctl cto ctr ctt ctu cub cuc cue cuh cuk cul cuo cur cut cuu ebb ebc ebe ebh ebk ebl ebo ebr ebt ebu ec- ecb ecc ece ech eck ecl eco ecr ect ecu eeb eec eee eek eel eeo eer eet ehb ehc ehe ehh ehl eho ehr eht ehu ekb ekc eke ekh ekl eko ekr ekt eku elb elc ele elh elk ell elo elr elt elu eo- eob eoc eoe eoh eok eol eoo eor eot eou erb erc ere erh erk erl ero err ert eru etb etc ete eth etk etl eto etr ett etu eu- eub euc eue eul eur eut hbb hbc hbe hbh hbk hbl hbo hbr hbt hbu hcb hcc hce hch hck hcl hco hcr hct he- heb hec hee heh hek hel heo her het heu hhb hhc hhe hhh hhk hhl hho hhr hht hhu hkb hkh hkk hkl hko hkr hkt hku hlb hlc hle hlh hll hlo hlr hlt hlu hob hoc hoe hoh hok hol hoo hor hot hou hr- hrb hrc hre hrh hrk hrl hro hrr hrt hru htb htc hte hth htk htl hto htr htt hub huc hue huh huk hul huo hur hut huu k-t kbb kbc kbe kbh kbk kbl kbo kbr kbu kcb kcc kce kch kck kcl kcr kct kcu ke- keb kec kee keh kek kel keo ker ket khe khh khk kho khr khu kkb kkc kke kkh kkk kkl kkr kkt kku kl- klb klc klh klo klr klt klu kob koc koe koh kok kol koo kor kot kou krc krk krl kro krr krt kru ktb ktc kte kth ktk ktl kto ktr ktt ktu kub kuc kue kuh kuk kul kur kut kuu lbb lbc lbe lbh lbk lbl lbo lbr lbt lbu lcb lcc lce lch lck lcl lco lcr lct lcu leb lec lee leh lek lel leo ler let leu lhb lhc lhh lhk lho lhr lht lhu lkb lkh lkl lkr lkt llb llc lle llk lll llo llr llt llu lob loc loe loh lok lol loo lor lot lou lrb lrc lrh lrk lro lrr lrt lru ltb ltc lte lth ltk ltl lto ltr ltt ltu lub luc lue luh luk lul luo lur lut luu ob- obb obc obe obh obk obl obo obr obt obu oc- ocb occ och ock ocl oco ocr oct ocu oeb oec oee oeh oel oeo oer oet ohc ohe ohh ohl oho ohr oht ohu okb okc oke okk okl oko okr oku olb olc ole olk oll olo olt olu oo- oob ooc ooh ook ool ooo oor oot or- orb orc ore orh ork orl oro orr ort oru ot- otb otc ote oth otk otl oto otr ott otu ou- ouc oue ouh ouk oul ouo our out rbb rbc rbe rbh rbk rbl rbo rbr rbt rbu rcb rcc rce rch rcl rco rcr rct rcu re- reb rec ree reh rek rel reo rer ret reu rh- rhb rhc rhe rhh rhl rho rhr rht rhu rkb rkc rke rkk rko rkt rku rlc rle rlh rll rlo rlr rlt rlu rob roc roe roh rok rol roo ror rot rou rrb rrc rrh rrk rrl rrr rrt rru rtb rtc rte rtk rtl rto rtr rtt rtu rub ruc rue ruh ruk ruo rur rut ruu tbb tbc tbe tbh tbk tbl tbo tbr tbt tbu tcb tcc tce tch tck tcl tco tcr tct tcu te- teb tec tee teh tek tel teo ter tet teu th- thb thc the thh thk thl tho thr tht thu tkb tkc tke tkk tkl tko tkr tkt tlc tle tlh tlk tll tlo tlr tlt tlu to- tob toc toe toh tok tol too tor tot tou trb trc tre trh trk trl tro trr trt tru ttb ttc tte tth ttk ttl tto ttr ttt ttu tub tuc tue tuh tuk tul tuo tur tut tuu ubb ubc ube ubh ubk ubl ubo ubr ubt ubu ucb ucc uce uch uck ucl uco ucr uct ucu ueb uec uee ueh uel uer uet uhb uhc uhe uhh uhl uho uhr uht uhu ukb ukc uke ukk ukl ukr uku ulb ulc ule ulk ull ulo ulr ult ulu uob uoc uoe uok uol uoo uor uot ur- urb urc ure urk url uro urr urt uru utb utc ute uth utk utl uto utr utt utu uuc uue uur uut uuu