-er -ol -th bbb bbc bbe bbh bbl bbo bbr bbt bcb bcc bce bch bcl bco bcr bct be- beb bec bee beh bel beo ber bet bhb bhc bhe bhh bhl bho bhr bht blb blc ble blh bll blo blr blt bob boc boe boh bol boo bor bot brb bre brh brl bro brr brt btb btc bte bth btl bto btr btt c-- cbb cbc cbe cbh cbl cbo cbr cbt ccb ccc cce cch ccl cco ccr cct ce- ceb cec cee ceh cel ceo cer cet ch- chb chc che chh chl cho chr cht cl- clb clc cle clh cll clo clr clt co- cob coc coe coh col coo cor cot crb crc cre crh crl cro crr crt ctb ctc cte cth ctl cto ctr ctt ebb ebc ebe ebh ebl ebo ebr ebt ec- ecb ecc ece ech ecl eco ecr ect eeb eec eee eel eeo eer eet ehb ehc ehe ehh ehl eho ehr eht elb elc ele elh ell elo elr elt eo- eob eoc eoe eoh eol eoo eor eot erb erc ere erh erl ero err ert etb etc ete eth etl eto etr ett hbb hbc hbe hbh hbl hbo hbr hbt hcb hcc hce hch hcl hco hcr hct he- heb hec hee heh hel heo her het hhb hhc hhe hhh hhl hho hhr hht hlb hlc hle hlh hll hlo hlr hlt hob hoc hoe hoh hol hoo hor hot hr- hrb hrc hre hrh hrl hro hrr hrt htb htc hte hth htl hto htr htt lbb lbc lbe lbh lbl lbo lbr lbt lcb lcc lce lch lcl lco lcr lct leb lec lee leh lel leo ler let lhb lhc lhh lho lhr lht llb llc lle lll llo llr llt lob loc loe loh lol loo lor lot lrb lrc lrh lro lrr lrt ltb ltc lte lth ltl lto ltr ltt ob- obb obc obe obh obl obo obr obt oc- ocb occ och ocl oco ocr oct oeb oec oee oeh oel oeo oer oet ohc ohe ohh ohl oho ohr oht olb olc ole oll olo olt oo- oob ooc ooh ool ooo oor oot or- orb orc ore orh orl oro orr ort ot- otb otc ote oth otl oto otr ott rbb rbc rbe rbh rbl rbo rbr rbt rcb rcc rce rch rcl rco rcr rct re- reb rec ree reh rel reo rer ret rh- rhb rhc rhe rhh rhl rho rhr rht rlc rle rlh rll rlo rlr rlt rob roc roe roh rol roo ror rot rrb rrc rrh rrl rrr rrt rtb rtc rte rtl rto rtr rtt tbb tbc tbe tbh tbl tbo tbr tbt tcb tcc tce tch tcl tco tcr tct te- teb tec tee teh tel teo ter tet th- thb thc the thh thl tho thr tht tlc tle tlh tll tlo tlr tlt to- tob toc toe toh tol too tor tot trb trc tre trh trl tro trr trt ttb ttc tte tth ttl tto ttr ttt