-er -ol bbb bbc bbe bbh bbl bbo bbr bcb bcc bce bch bcl bco bcr bcv be- beb bec bee beh bel beo ber bev bhb bhc bhe bhh bhl bho bhr bhv blb blc ble blh bll blo blr blv bob boc boe boh bol boo bor bov brb bre brh brl bro brr brv bvb bvc bve bvh bvl bvo bvr bvv c-- cbb cbc cbe cbh cbl cbo cbr cbv ccb ccc cce cch ccl cco ccr ccv ce- ceb cec cee ceh cel ceo cer cev ch- chb chc che chh chl cho chr chv cl- clb clc cle clh cll clo clr clv co- cob coc coe coh col coo cor cov crb crc cre crh crl cro crr crv cvb cvc cve cvh cvl cvo cvr cvv ebb ebc ebe ebh ebl ebo ebr ebv ec- ecb ecc ece ech ecl eco ecr ecv eeb eec eee eel eeo eer eev ehb ehc ehe ehh ehl eho ehr ehv elb elc ele elh ell elo elr elv eo- eob eoc eoe eoh eol eoo eor erb erc ere erh erl ero err erv evb evc eve evh evl evo evr evv hbb hbc hbe hbh hbl hbo hbr hbv hcb hcc hce hch hcl hco hcr hcv he- heb hec hee heh hel heo her hev hhb hhc hhe hhh hhl hho hhr hhv hlb hlc hle hlh hll hlo hlr hlv hob hoc hoe hoh hol hoo hor hov hr- hrb hrc hre hrh hrl hro hrr hrv hv- hvb hvc hvl hvo hvr hvv lbb lbc lbe lbh lbl lbo lbr lbv lcb lcc lce lch lcl lco lcr lcv leb lec lee leh lel leo ler lev lhb lhc lhh lho lhr lhv llb llc lle lll llo llr llv lob loc loe loh lol loo lor lov lrb lrc lrh lro lrr lrv lvb lvc lve lvh lvl lvr lvv ob- obb obc obe obh obl obo obr obv oc- ocb occ och ocl oco ocr ocv oeb oec oee oeh oel oeo oer ohc ohe ohh ohl oho ohr olb olc ole oll olo oo- oob ooc ooh ool ooo oor oov or- orb orc ore orh orl oro orr orv ov- ovb ovc ove ovh ovl ovo ovv rbb rbc rbe rbh rbl rbo rbr rcb rcc rce rch rcl rco rcr rcv re- reb rec ree reh rel reo rer rev rh- rhb rhc rhe rhh rhl rho rhr rhv rlc rle rlh rll rlo rlr rob roc roe roh rol roo ror rov rrb rrc rrh rrl rrr rvb rvc rve rvh rvl rvo rvr rvv v-e vbc vbh vbl vbo vbr vbv vcc vce vch vcl vco vcr veb vec vee veh vel veo ver vh- vhb vhc vhe vho vl- vlb vlc vle vll vlo vlv vob voc voe voh vol voo vor vov vrb vrc vre vrh vrr vvb vvc vvo vvr vvv