-th bbb bbh bbn bbo bbr bbt bhb bhh bho bhr bht bnb bnn bno bnr bnt bob boh bon boo bor bot brb brh brn bro brr brt btb bth btn bto btr btt hbb hbh hbn hbo hbr hbt hhb hhh hhn hho hhr hht hnb hnh hnn hno hnt hob hoh hon hoo hor hot hr- hrb hrh hrn hro hrr hrt htb hth htn hto htr htt nbb nbn nbo nbr nbt nhb nhh nhn nhr nht nnb nnh nnn nno nnt no- nob noh non noo nor not nrb nrn nro nrr nrt ntb nth ntn nto ntr ntt ob- obb obh obn obo obr obt ohh ohn oho ohr oht on- onb onh onn ono onr ont oo- oob ooh oon ooo oor oot or- orb orh orn oro orr ort ot- otb oth otn oto otr ott rbb rbh rbn rbo rbr rbt rh- rhb rhh rhn rho rhr rht rnb rnh rnn rno rnr rnt rob roh ron roo ror rot rrb rrh rrn rrr rrt rtb rtn rto rtr rtt tbb tbh tbn tbo tbr tbt th- thb thh thn tho thr tht tnb tnh tnn tno tnr tnt to- tob toh ton too tor tot trb trh trn tro trr trt ttb tth ttn tto ttr ttt