-th bbb bbc bbe bbh bbk bbn bbo bbt bcb bcc bce bch bck bcn bco bct be- beb bec bee beh bek ben beo bet bhb bhc bhe bhh bhk bho bht bkb bkc bke bkk bkn bko bkt bnb bnc bne bnk bnn bno bnt bob boc boe boh bok bon boo bot btb btc bte bth btk btn bto btt c-- cbb cbc cbe cbh cbk cbn cbo cbt ccb ccc cce cch cck ccn cco cct ce- ceb cec cee ceh cek cen ceo cet ch- chb chc che chh chk chn cho cht ckb ckc ckh cko ckt cn- cnb cnc cne cnh cnn cno cnt co- cob coc coe coh cok con coo cot ctb ctc cte cth ctk ctn cto ctt ebb ebc ebe ebh ebk ebn ebo ebt ec- ecb ecc ece ech eck ecn eco ect eeb eec eee eek een eeo eet ehb ehc ehe ehh ehn eho eht ekb ekc eke ekh eko ekt en- enb enc ene enh enk enn eno ent eo- eob eoc eoe eoh eok eon eoo eot etb etc ete eth etk etn eto ett hbb hbc hbe hbh hbk hbn hbo hbt hcb hcc hce hch hck hcn hco hct he- heb hec hee heh hek hen heo het hhb hhc hhe hhh hhk hhn hho hht hkb hkh hkk hkn hko hkt hnb hnc hne hnh hnk hnn hno hnt hob hoc hoe hoh hok hon hoo hot htb htc hte hth htk htn hto htt k-t kbb kbc kbe kbh kbk kbn kbo kcb kcc kce kch kck kcn kct ke- keb kec kee keh kek ken keo ket khe khh khk khn kho kkb kkc kke kkh kkk kkn kkt kn- knc kne knk knn kno knt kob koc koe koh kok kon koo kot ktb ktc kte kth ktk ktn kto ktt nbb nbc nbe nbk nbn nbo nbt ncb ncc nce nch nck ncn nco nct ne- neb nec nee neh nek nen neo net nhb nhc nhe nhh nhk nhn nht nkc nke nkk nkn nko nkt nnb nnc nne nnh nnk nnn nno nnt no- nob noc noe noh nok non noo not ntb ntc nte nth ntk ntn nto ntt ob- obb obc obe obh obk obn obo obt oc- ocb occ och ock ocn oco oct oeb oec oee oeh oen oeo oet ohc ohe ohh ohn oho oht okb okc oke okk oko on- onb onc one onh onk onn ono ont oo- oob ooc ooh ook oon ooo oot ot- otb otc ote oth otk otn oto ott tbb tbc tbe tbh tbk tbn tbo tbt tcb tcc tce tch tck tcn tco tct te- teb tec tee teh tek ten teo tet th- thb thc the thh thk thn tho tht tkb tkc tke tkk tko tkt tnb tnc tne tnh tnk tnn tno tnt to- tob toc toe toh tok ton too tot ttb ttc tte tth ttk ttn tto ttt