bbb bbe bbg bbo bbs bbt be- beb bee beg beo bes bet bgb bge bgg bgo bgs bgt bob boe bog boo bos bot bsb bse bsg bso bss bst btb bte btg bto bts btt ebb ebe ebg ebo ebs ebt eeb eee eeg eeo ees eet egb ege egg ego egs egt eo- eob eoe eog eoo eos eot es- esb ese esg eso ess est etb ete etg eto ets ett gbe gbg gbo gbs gbt ge- geb gee geg geo ges get ggb ggg ggo ggs ggt gob goe gog goo gos got gsb gse gsg gso gss gst gtb gte gtg gto gts gtt ob- obb obe obg obo obs obt oeb oee oeg oeo oes oet oge ogg ogo ogs ogt oo- oob oog ooo oos oot os- osb ose osg oso oss ost ot- otb ote otg oto ots ott sbb sbe sbg sbo sbs sbt se- seb see seg seo ses set sgb sge sgg sgo sgs sgt sob soe sog soo sos sot ss- ssb sse ssg sso sss sst stb ste stg sto sts stt tbb tbe tbg tbo tbs tbt te- teb tee teg teo tes tet tgb tge tgg tgo tgs tgt to- tob toe tog too tos tot tsb tse tsg tso tss tst ttb tte ttg tto tts ttt