-th bbb bbd bbh bbo bbt bdb bdd bdh bdo bdt bhb bhd bhh bho bht bob bod boh boo bot btb btd bth bto btt dbb dbd dbh dbo dbt ddb ddd ddh ddo ddt dh- dhb dhd dhh dho dht dob dod doh doo dot dtb dtd dth dto dtt hbb hbd hbh hbo hbt hdb hdd hdh hdo hdt hhb hhd hhh hho hht hob hod hoh hoo hot htb htd hth hto htt ob- obb obd obh obo obt odb odd odh odo odt ohd ohh oho oht oo- oob ood ooh ooo oot ot- otb otd oth oto ott tbb tbd tbh tbo tbt tdb tdd tdh tdo tdt th- thb thd thh tho tht to- tob tod toh too tot ttb ttd tth tto ttt