bbb bbe bbk bbo bbt be- beb bee bek beo bet bjj bjk bjt bkb bke bkk bko bkt bob boe boj bok boo bot btb bte btk bto btt ebb ebe ebj ebk ebo ebt eeb eee eek eeo eet ejo ejt ekb eke eko ekt eo- eob eoe eok eoo eot etb ete etj etk eto ett jbj jbk jbo jbt jeb jee jej jek jeo jet jjb jjj jjk jkb jkk jko jkt job joe joj jok joo jot jtb jte jtk jtt k-t kbb kbe kbk kbo ke- keb kee kek keo ket kjb kje kkb kke kkk kkt kob koe kok koo kot ktb kte ktj ktk kto ktt ob- obb obe obj obk obo obt oeb oee oeo oet ojb oje ojo okb oke okj okk oko oo- oob ook ooo oot ot- otb ote otk oto ott tbb tbe tbj tbk tbo tbt te- teb tee tej tek teo tet tje tjo tkb tke tkk tko tkt to- tob toe toj tok too tot ttb tte ttk tto ttt