bbb bbc bbn bbo bbr bcb bcc bcj bcn bco bcr bjc bjj bjn bjr bnb bnc bnj bnn bno bnr bob boc boj bon boo bor brb brj brn bro brr c-- c-j cbb cbc cbj cbn cbo cbr ccb ccc ccj ccn cco ccr cjb cjc cjr cn- cnb cnc cnj cnn cno cnr co- cob coc coj con coo cor crb crc crj crn cro crr jbc jbj jbo jbr jcb jcc jco jcr jjb jjc jjj jjr jnc jnj jnn jno jnr job joc joj jon joo jor jrb jrc jrn jro jrr nbb nbc nbn nbo nbr ncb ncc ncn nco ncr njc njn nnb nnc nnn nno no- nob noc noj non noo nor nrb nrc nrj nrn nro nrr ob- obb obc obj obn obo obr oc- ocb occ ocj ocn oco ocr ojb ojc ojo on- onb onc onj onn ono onr oo- oob ooc oon ooo oor or- orb orc orn oro orr rbb rbc rbn rbo rbr rcb rcc rcj rcn rco rcr rjc rjr rnb rnc rnn rno rnr rob roc roj ron roo ror rrb rrc rrn rrr