-ey bbb bbe bbk bbo bbt bbx bby be- beb bee bek beo bet bex bey bkb bke bkk bko bkt bkx bob boe bok boo bot box boy btb bte btk bto btt btx bty bxb bxo bxx by- bye byk byo byt ebb ebe ebk ebo ebt ebx eby eeb eee eek eeo eet eex eey ekb eke eko ekt eky eo- eob eoe eok eoo eot etb ete etk eto ett etx ety ex- exe exo ext exx exy eye eyo eyt k-t kbb kbe kbk kbo kbx ke- keb kee kek keo ket kex key kkb kke kkk kkt kky kob koe kok koo kot koy ktb kte ktk kto ktt kxo kxy kye kyo kyt kyx ob- obb obe obk obo obt obx oby oeb oee oeo oet oex oey okb oke okk oko oo- oob ook ooo oot oox ot- otb ote otk oto ott ox- oxb oxo oxt oxx oxy oye oyo t-x tbb tbe tbk tbo tbt te- teb tee tek teo tet tex tey tkb tke tkk tko tkt tky to- tob toe tok too tot tox toy ttb tte ttk tto ttt ttx tty txe txk txt tye tyo tyt xbe xbx xee xet xex xkb xke xok xoo xot xox xtx xty xxo xxx xxy xyy ybe yby yeb yee yek yeo yet yex yey ykk yob yoe yok yoo yot yox yoy yte ytk yto ytt yxe yxy yyb yye yyt yyy