-th bbb bbe bbh bbk bbo bbt be- beb bee beh bek beo bet bhb bhe bhh bhk bho bht bkb bke bkk bko bkt bob boe boh bok boo bot btb bte bth btk bto btt ebb ebe ebh ebk ebo ebt eeb eee eek eeo eet ehb ehe ehh eho eht ekb eke ekh eko ekt eo- eob eoe eoh eok eoo eot etb ete eth etk eto ett hbb hbe hbh hbk hbo hbt he- heb hee heh hek heo het hhb hhe hhh hhk hho hht hkb hkh hkk hko hkt hob hoe hoh hok hoo hot htb hte hth htk hto htt k-t kbb kbe kbh kbk kbo ke- keb kee keh kek keo ket khe khh khk kho kkb kke kkh kkk kkt kob koe koh kok koo kot ktb kte kth ktk kto ktt ob- obb obe obh obk obo obt oeb oee oeh oeo oet ohe ohh oho oht okb oke okk oko oo- oob ooh ook ooo oot ot- otb ote oth otk oto ott tbb tbe tbh tbk tbo tbt te- teb tee teh tek teo tet th- thb the thh thk tho tht tkb tke tkk tko tkt to- tob toe toh tok too tot ttb tte tth ttk tto ttt