-th bbb bbc bbd bbe bbh bbn bbo bbt bcb bcc bcd bce bch bcn bco bct bdb bdc bdd bde bdh bdo bdt be- beb bec bed bee beh ben beo bet bhb bhc bhd bhe bhh bho bht bnb bnc bnd bne bnn bno bnt bob boc bod boe boh bon boo bot btb btc btd bte bth btn bto btt c-- cbb cbc cbd cbe cbh cbn cbo cbt ccb ccc ccd cce cch ccn cco cct cdb cdc cdd cde cdh cdn cdo cdt ce- ceb cec ced cee ceh cen ceo cet ch- chb chc chd che chh chn cho cht cn- cnb cnc cnd cne cnh cnn cno cnt co- cob coc cod coe coh con coo cot ctb ctc ctd cte cth ctn cto ctt dbb dbc dbd dbe dbh dbn dbo dbt dcb dcc dcd dce dcn dco dct ddb ddc ddd dde ddh ddn ddo ddt de- deb dec ded dee deh den deo det dh- dhb dhc dhd dhe dhh dho dht dnb dnc dnd dne dnh dnn dno dnt dob doc dod doe doh don doo dot dtb dtc dtd dte dth dtn dto dtt ebb ebc ebd ebe ebh ebn ebo ebt ec- ecb ecc ecd ece ech ecn eco ect ed- edb edc edd ede edh edn edo edt eeb eec eed eee een eeo eet ehb ehc ehd ehe ehh ehn eho eht en- enb enc end ene enh enn eno ent eo- eob eoc eod eoe eoh eon eoo eot etb etc etd ete eth etn eto ett hbb hbc hbd hbe hbh hbn hbo hbt hcb hcc hcd hce hch hcn hco hct hdb hdc hdd hde hdh hdn hdo hdt he- heb hec hed hee heh hen heo het hhb hhc hhd hhe hhh hhn hho hht hnb hnc hnd hne hnh hnn hno hnt hob hoc hod hoe hoh hon hoo hot htb htc htd hte hth htn hto htt nbb nbc nbd nbe nbn nbo nbt ncb ncc ncd nce nch ncn nco nct ndb ndc ndd nde ndh ndn ndo ndt ne- neb nec ned nee neh nen neo net nhb nhc nhd nhe nhh nhn nht nnb nnc nne nnh nnn nno nnt no- nob noc nod noe noh non noo not ntb ntc ntd nte nth ntn nto ntt ob- obb obc obd obe obh obn obo obt oc- ocb occ ocd och ocn oco oct odb odc odd ode odh odn odo odt oeb oec oed oee oeh oen oeo oet ohc ohd ohe ohh ohn oho oht on- onb onc ond one onh onn ono ont oo- oob ooc ood ooh oon ooo oot ot- otb otc otd ote oth otn oto ott tbb tbc tbd tbe tbh tbn tbo tbt tcb tcc tcd tce tch tcn tco tct tdb tdc tdd tde tdh tdn tdo tdt te- teb tec ted tee teh ten teo tet th- thb thc thd the thh thn tho tht tnb tnc tnd tne tnh tnn tno tnt to- tob toc tod toe toh ton too tot ttb ttc ttd tte tth ttn tto ttt