-th bbb bbe bbh bbo bbt bbx be- beb bee beh beo bet bex bhb bhe bhh bho bht bhx bob boe boh boo bot box btb bte bth bto btt btx bxb bxo bxx ebb ebe ebh ebo ebt ebx eeb eee eeo eet eex ehb ehe ehh eho eht eo- eob eoe eoh eoo eot etb ete eth eto ett etx ex- exe exh exo ext exx hbb hbe hbh hbo hbt hbx he- heb hee heh heo het hex hhb hhe hhh hho hht hob hoe hoh hoo hot hox htb hte hth hto htt htx ob- obb obe obh obo obt obx oeb oee oeh oeo oet oex ohe ohh oho oht oo- oob ooh ooo oot oox ot- otb ote oth oto ott ox- oxb oxo oxt oxx t-x tbb tbe tbh tbo tbt te- teb tee teh teo tet tex th- thb the thh tho tht thx to- tob toe toh too tot tox ttb tte tth tto ttt ttx txe txt xbe xbx xee xet xex xht xoo xot xox xtx xxo xxx