-er bbb bbe bbk bbn bbo bbr be- beb bee bek ben beo ber bjj bjk bjn bjr bkb bke bkk bkn bko bkr bnb bne bnj bnk bnn bno bnr bob boe boj bok bon boo bor brb bre brj brk brn bro brr ebb ebe ebj ebk ebn ebo ebr eeb eee eek een eeo eer ejo ekb eke eko ekr en- enb ene enk enn eno enr eo- eob eoe eok eon eoo eor erb ere erk ern ero err jbj jbk jbo jbr jeb jee jej jek jen jeo jer jjb jjj jjk jjr jkb jkk jkn jko jkr jne jnj jnn jno jnr job joe joj jok jon joo jor jrb jrk jrn jro jrr kbb kbe kbk kbn kbo kbr ke- keb kee kek ken keo ker kjb kje kjr kkb kke kkk kkn kkr kn- kne knk knn kno knr kob koe kok kon koo kor krk krn kro krr nbb nbe nbk nbn nbo nbr ne- neb nee nej nek nen neo ner nje njk njn nke nkj nkk nkn nko nkr nnb nne nnk nnn nno no- nob noe noj nok non noo nor nrb nre nrj nrk nrn nro nrr ob- obb obe obj obk obn obo obr oeb oee oen oeo oer ojb oje ojo okb oke okj okk oko okr on- onb one onj onk onn ono onr oo- oob ook oon ooo oor or- orb ore ork orn oro orr rbb rbe rbk rbn rbo rbr re- reb ree rek ren reo rer rjk rjr rkb rke rkk rko rnb rnn rno rnr rob roe roj rok ron roo ror rrb rrk rrn rrr