-th bbb bbc bbh bbn bbo bbs bbt bcb bcc bch bcn bco bcs bct bhb bhc bhh bho bhs bht bnb bnc bnn bno bns bnt bob boc boh bon boo bos bot bsb bsc bsh bsn bso bss bst btb btc bth btn bto bts btt c-- cbb cbc cbh cbn cbo cbs cbt ccb ccc cch ccn cco ccs cct ch- chb chc chh chn cho chs cht cn- cnb cnc cnh cnn cno cns cnt co- cob coc coh con coo cos cot csb csc csh csn cso css cst ctb ctc cth ctn cto cts ctt hbb hbc hbh hbn hbo hbs hbt hcb hcc hch hcn hco hcs hct hhb hhc hhh hhn hho hhs hht hnb hnc hnh hnn hno hns hnt hob hoc hoh hon hoo hos hot hsb hsc hsh hsn hss hst htb htc hth htn hto hts htt nbb nbc nbn nbo nbs nbt ncb ncc nch ncn nco ncs nct nhb nhc nhh nhn nhs nht nnb nnc nnh nnn nno nns nnt no- nob noc noh non noo nos not nsb nsc nsh nsn nso nss nst ntb ntc nth ntn nto nts ntt ob- obb obc obh obn obo obs obt oc- ocb occ och ocn oco ocs oct ohc ohh ohn oho ohs oht on- onb onc onh onn ono ons ont oo- oob ooc ooh oon ooo oos oot os- osb osc osh osn oso oss ost ot- otb otc oth otn oto ots ott sbb sbc sbh sbn sbo sbs sbt scb scc sch scn sco scs sct sh- shb shc shh shn sho shs sht snb snc snn sno sns snt sob soc soh son soo sos sot ss- ssb ssc ssh ssn sso sss sst stb stc sth stn sto sts stt tbb tbc tbh tbn tbo tbs tbt tcb tcc tch tcn tco tcs tct th- thb thc thh thn tho ths tht tnb tnc tnh tnn tno tns tnt to- tob toc toh ton too tos tot tsb tsc tsh tsn tso tss tst ttb ttc tth ttn tto tts ttt