-ol -th bbb bbc bbe bbh bbl bbo bbt bcb bcc bce bch bcl bco bct be- beb bec bee beh bel beo bet bhb bhc bhe bhh bhl bho bht blb blc ble blh bll blo blt bob boc boe boh bol boo bot btb btc bte bth btl bto btt c-- cbb cbc cbe cbh cbl cbo cbt ccb ccc cce cch ccl cco cct ce- ceb cec cee ceh cel ceo cet ch- chb chc che chh chl cho cht cl- clb clc cle clh cll clo clt co- cob coc coe coh col coo cot ctb ctc cte cth ctl cto ctt ebb ebc ebe ebh ebl ebo ebt ec- ecb ecc ece ech ecl eco ect eeb eec eee eel eeo eet ehb ehc ehe ehh ehl eho eht elb elc ele elh ell elo elt eo- eob eoc eoe eoh eol eoo eot etb etc ete eth etl eto ett hbb hbc hbe hbh hbl hbo hbt hcb hcc hce hch hcl hco hct he- heb hec hee heh hel heo het hhb hhc hhe hhh hhl hho hht hlb hlc hle hlh hll hlo hlt hob hoc hoe hoh hol hoo hot htb htc hte hth htl hto htt lbb lbc lbe lbh lbl lbo lbt lcb lcc lce lch lcl lco lct leb lec lee leh lel leo let lhb lhc lhh lho lht llb llc lle lll llo llt lob loc loe loh lol loo lot ltb ltc lte lth ltl lto ltt ob- obb obc obe obh obl obo obt oc- ocb occ och ocl oco oct oeb oec oee oeh oel oeo oet ohc ohe ohh ohl oho oht olb olc ole oll olo olt oo- oob ooc ooh ool ooo oot ot- otb otc ote oth otl oto ott tbb tbc tbe tbh tbl tbo tbt tcb tcc tce tch tcl tco tct te- teb tec tee teh tel teo tet th- thb thc the thh thl tho tht tlc tle tlh tll tlo tlt to- tob toc toe toh tol too tot ttb ttc tte tth ttl tto ttt