-ol bbb bbc bbe bbg bbl bbn bbo bbs bcb bcc bce bcg bcl bcn bco bcs be- beb bec bee beg bel ben beo bes bgb bgc bge bgg bgl bgn bgo bgs blb blc ble blg bll bln blo bls bnb bnc bne bng bnl bnn bno bns bob boc boe bog bol bon boo bos bsb bsc bse bsg bsl bsn bso bss c-- cbb cbc cbe cbg cbl cbn cbo cbs ccb ccc cce ccg ccl ccn cco ccs ce- ceb cec cee ceg cel cen ceo ces cgb cgc cge cgg cgl cgn cgo cgs cl- clb clc cle clg cll cln clo cls cn- cnb cnc cne cng cnl cnn cno cns co- cob coc coe cog col con coo cos csb csc cse csg csl csn cso css ebb ebc ebe ebg ebl ebn ebo ebs ec- ecb ecc ece ecg ecl ecn eco ecs eeb eec eee eeg eel een eeo ees egb egc ege egg egl egn ego egs elb elc ele elg ell eln elo els en- enb enc ene eng enl enn eno ens eo- eob eoc eoe eog eol eon eoo eos es- esb esc ese esg esl esn eso ess gbc gbe gbg gbl gbn gbo gbs gcb gcc gce gcg gcl gcn gco gcs ge- geb gec gee geg gel gen geo ges ggb ggc ggg ggn ggo ggs glb glc gle glg gll gln glo gls gnb gnc gne gnl gnn gno gns gob goc goe gog gol gon goo gos gsb gsc gse gsg gsl gsn gso gss lbb lbc lbe lbg lbl lbo lbs lcb lcc lce lcg lcl lcn lco lcs leb lec lee leg lel len leo les lgb lgc lge lgg lgl lgn lgo lgs llb llc lle llg lll lln llo lls lnb lnc lne lng lnl lnn lno lns lob loc loe log lol lon loo los lsb lsc lse lsg lsl lsn lso lss nbb nbc nbe nbg nbl nbn nbo nbs ncb ncc nce ncg ncl ncn nco ncs ne- neb nec nee neg nel nen neo nes ngb ngc nge ngg ngl ngn ngo ngs nlb nlc nle nlg nll nln nlo nls nnb nnc nne nng nnl nnn nno nns no- nob noc noe nog nol non noo nos nsb nsc nse nsg nsl nsn nso nss ob- obb obc obe obg obl obn obo obs oc- ocb occ ocg ocl ocn oco ocs oeb oec oee oeg oel oen oeo oes ogc oge ogg ogl ogn ogo ogs olb olc ole olg oll oln olo ols on- onb onc one ong onl onn ono ons oo- oob ooc oog ool oon ooo oos os- osb osc ose osg osl osn oso oss sbb sbc sbe sbg sbl sbn sbo sbs scb scc sce scg scl scn sco scs se- seb sec see seg sel sen seo ses sgb sgc sge sgg sgl sgn sgo sgs slb slc sle slg sll sln slo sls snb snc sne sng snl snn sno sns sob soc soe sog sol son soo sos ss- ssb ssc sse ssg ssl ssn sso sss