bbb bbe bbk bbn bbo bbs bbt be- beb bee bek ben beo bes bet bkb bke bkk bkn bko bks bkt bnb bne bnk bnn bno bns bnt bob boe bok bon boo bos bot bsb bse bsk bsn bso bss bst btb bte btk btn bto bts btt ebb ebe ebk ebn ebo ebs ebt eeb eee eek een eeo ees eet ekb eke eko eks ekt en- enb ene enk enn eno ens ent eo- eob eoe eok eon eoo eos eot es- esb ese esk esn eso ess est etb ete etk etn eto ets ett k-t kbb kbe kbk kbn kbo kbs ke- keb kee kek ken keo kes ket kkb kke kkk kkn kks kkt kn- kne knk knn kno knt kob koe kok kon koo kos kot ksb kse ksk ksn kso kss kst ktb kte ktk ktn kto kts ktt nbb nbe nbk nbn nbo nbs nbt ne- neb nee nek nen neo nes net nke nkk nkn nko nks nkt nnb nne nnk nnn nno nns nnt no- nob noe nok non noo nos not nsb nse nsk nsn nso nss nst ntb nte ntk ntn nto nts ntt ob- obb obe obk obn obo obs obt oeb oee oen oeo oes oet okb oke okk oko oks on- onb one onk onn ono ons ont oo- oob ook oon ooo oos oot os- osb ose osk osn oso oss ost ot- otb ote otk otn oto ots ott sbb sbe sbk sbn sbo sbs sbt se- seb see sek sen seo ses set sk- skb ske skk sko sks skt snb sne snk snn sno sns snt sob soe sok son soo sos sot ss- ssb sse ssk ssn sso sss sst stb ste stk stn sto sts stt tbb tbe tbk tbn tbo tbs tbt te- teb tee tek ten teo tes tet tkb tke tkk tko tks tkt tnb tne tnk tnn tno tns tnt to- tob toe tok ton too tos tot tsb tse tsk tsn tso tss tst ttb tte ttk ttn tto tts ttt