bbb bbn bbo bbr bjj bjn bjr bnb bnj bnn bno bnr bob boj bon boo bor brb brj brn bro brr jbj jbo jbr jjb jjj jjr jnj jnn jno jnr job joj jon joo jor jrb jrn jro jrr nbb nbn nbo nbr njn nnb nnn nno no- nob noj non noo nor nrb nrj nrn nro nrr ob- obb obj obn obo obr ojb ojo on- onb onj onn ono onr oo- oob oon ooo oor or- orb orn oro orr rbb rbn rbo rbr rjr rnb rnn rno rnr rob roj ron roo ror rrb rrn rrr