-ey bbb bbe bbn bbo bbt bby be- beb bee ben beo bet bey bnb bne bnn bno bnt bob boe bon boo bot boy btb bte btn bto btt bty by- bye byn byo byt ebb ebe ebn ebo ebt eby eeb eee een eeo eet eey en- enb ene enn eno ent eny eo- eob eoe eon eoo eot etb ete etn eto ett ety eye eyn eyo eyt nbb nbe nbn nbo nbt ne- neb nee nen neo net ney nnb nne nnn nno nnt no- nob noe non noo not noy ntb nte ntn nto ntt nye nyn nyo nyt nyy ob- obb obe obn obo obt oby oeb oee oen oeo oet oey on- onb one onn ono ont ony oo- oob oon ooo oot ot- otb ote otn oto ott oye oyo tbb tbe tbn tbo tbt te- teb tee ten teo tet tey tnb tne tnn tno tnt to- tob toe ton too tot toy ttb tte ttn tto ttt tty tye tyn tyo tyt ybe yby yeb yee yen yeo yet yey yne ynn yny yob yoe yon yoo yot yoy yte ytn yto ytt yyb yye yyt yyy