-ol bbb bbc bbe bbl bbo bbs bbt bcb bcc bce bcj bcl bco bcs bct be- beb bec bee bel beo bes bet bjc bjj bjs bjt blb blc ble blj bll blo bls blt bob boc boe boj bol boo bos bot bsb bsc bse bsj bsl bso bss bst btb btc bte btl bto bts btt c-- c-j cbb cbc cbe cbj cbl cbo cbs cbt ccb ccc cce ccj ccl cco ccs cct ce- ceb cec cee cej cel ceo ces cet cjb cjc cjs cl- clb clc cle clj cll clo cls clt co- cob coc coe coj col coo cos cot csb csc cse csj csl cso css cst ctb ctc cte ctl cto cts ctt ebb ebc ebe ebj ebl ebo ebs ebt ec- ecb ecc ece ecj ecl eco ecs ect eeb eec eee eel eeo ees eet ejc ejl ejo ejt elb elc ele ell elo els elt eo- eob eoc eoe eol eoo eos eot es- esb esc ese esl eso ess est etb etc ete etj etl eto ets ett jbc jbj jbl jbo jbs jbt jcb jcc jce jcl jco jcs jct jeb jec jee jej jel jeo jes jet jjb jjc jjj jjl jjs jlb jlc jle jll jlo jls jlt job joc joe joj jol joo jos jot jsb jsc jse jsj jsl jso jss jst jtb jtc jte jtl jts jtt lbb lbc lbe lbj lbl lbo lbs lbt lcb lcc lce lcj lcl lco lcs lct leb lec lee lej lel leo les let lje ljj ljs llb llc lle llj lll llo lls llt lob loc loe loj lol loo los lot lsb lsc lse lsj lsl lso lss lst ltb ltc lte ltl lto lts ltt ob- obb obc obe obj obl obo obs obt oc- ocb occ ocj ocl oco ocs oct oeb oec oee oel oeo oes oet ojb ojc oje ojo ojs olb olc ole oll olo ols olt oo- oob ooc ool ooo oos oot os- osb osc ose osj osl oso oss ost ot- otb otc ote otl oto ots ott sbb sbc sbe sbj sbl sbo sbs sbt scb scc sce scj scl sco scs sct se- seb sec see sej sel seo ses set sjb sjc sje sjj sjs sjt slb slc sle slj sll slo sls slt sob soc soe soj sol soo sos sot ss- ssb ssc sse ssj ssl sso sss sst stb stc ste stj stl sto sts stt tbb tbc tbe tbj tbl tbo tbs tbt tcb tcc tce tcj tcl tco tcs tct te- teb tec tee tej tel teo tes tet tjc tje tjo tjs tlc tle tlj tll tlo tls tlt to- tob toc toe toj tol too tos tot tsb tsc tse tsj tsl tso tss tst ttb ttc tte ttl tto tts ttt