bbb bbc bbd bbe bbn bbo bbs bbt bcb bcc bcd bce bcn bco bcs bct bdb bdc bdd bde bdo bds bdt be- beb bec bed bee ben beo bes bet bnb bnc bnd bne bnn bno bns bnt bob boc bod boe bon boo bos bot bsb bsc bsd bse bsn bso bss bst btb btc btd bte btn bto bts btt c-- cbb cbc cbd cbe cbn cbo cbs cbt ccb ccc ccd cce ccn cco ccs cct cdb cdc cdd cde cdn cdo cds cdt ce- ceb cec ced cee cen ceo ces cet cn- cnb cnc cnd cne cnn cno cns cnt co- cob coc cod coe con coo cos cot csb csc csd cse csn cso css cst ctb ctc ctd cte ctn cto cts ctt dbb dbc dbd dbe dbn dbo dbs dbt dcb dcc dcd dce dcn dco dcs dct ddb ddc ddd dde ddn ddo dds ddt de- deb dec ded dee den deo des det dnb dnc dnd dne dnn dno dns dnt dob doc dod doe don doo dos dot dsb dsc dsd dse dsn dso dss dst dtb dtc dtd dte dtn dto dts dtt ebb ebc ebd ebe ebn ebo ebs ebt ec- ecb ecc ecd ece ecn eco ecs ect ed- edb edc edd ede edn edo eds edt eeb eec eed eee een eeo ees eet en- enb enc end ene enn eno ens ent eo- eob eoc eod eoe eon eoo eos eot es- esb esc esd ese esn eso ess est etb etc etd ete etn eto ets ett nbb nbc nbd nbe nbn nbo nbs nbt ncb ncc ncd nce ncn nco ncs nct ndb ndc ndd nde ndn ndo nds ndt ne- neb nec ned nee nen neo nes net nnb nnc nne nnn nno nns nnt no- nob noc nod noe non noo nos not nsb nsc nsd nse nsn nso nss nst ntb ntc ntd nte ntn nto nts ntt ob- obb obc obd obe obn obo obs obt oc- ocb occ ocd ocn oco ocs oct odb odc odd ode odn odo ods odt oeb oec oed oee oen oeo oes oet on- onb onc ond one onn ono ons ont oo- oob ooc ood oon ooo oos oot os- osb osc osd ose osn oso oss ost ot- otb otc otd ote otn oto ots ott sbb sbc sbd sbe sbn sbo sbs sbt scb scc scd sce scn sco scs sct sdb sdc sdd sde sdn sdo sds sdt se- seb sec sed see sen seo ses set snb snc snd sne snn sno sns snt sob soc sod soe son soo sos sot ss- ssb ssc ssd sse ssn sso sss sst stb stc std ste stn sto sts stt tbb tbc tbd tbe tbn tbo tbs tbt tcb tcc tcd tce tcn tco tcs tct tdb tdc tdd tde tdn tdo tds tdt te- teb tec ted tee ten teo tes tet tnb tnc tnd tne tnn tno tns tnt to- tob toc tod toe ton too tos tot tsb tsc tsd tse tsn tso tss tst ttb ttc ttd tte ttn tto tts ttt