-th bbb bbh bbn bbs bbt bhb bhh bhs bht bnb bnn bns bnt bsb bsh bsn bss bst btb bth btn bts btt hbb hbh hbn hbs hbt hhb hhh hhn hhs hht hnb hnh hnn hns hnt hsb hsh hsn hss hst htb hth htn hts htt nbb nbn nbs nbt nhb nhh nhn nhs nht nnb nnh nnn nns nnt nsb nsh nsn nss nst ntb nth ntn nts ntt sbb sbh sbn sbs sbt sh- shb shh shn shs sht snb snn sns snt ss- ssb ssh ssn sss sst stb sth stn sts stt tbb tbh tbn tbs tbt th- thb thh thn ths tht tnb tnh tnn tns tnt tsb tsh tsn tss tst ttb tth ttn tts ttt