-er bbb bbc bbe bbf bbn bbo bbr bcb bcc bce bcf bcj bcn bco bcr be- beb bec bee bef ben beo ber bfb bfc bfe bff bfj bfn bfo bfr bjc bjf bjj bjn bjr bnb bnc bne bnf bnj bnn bno bnr bob boc boe bof boj bon boo bor brb bre brf brj brn bro brr c-- c-j cbb cbc cbe cbf cbj cbn cbo cbr ccb ccc cce ccf ccj ccn cco ccr ce- ceb cec cee cef cej cen ceo cer cfb cfc cfe cff cfn cfo cfr cjb cjc cjf cjr cn- cnb cnc cne cnf cnj cnn cno cnr co- cob coc coe cof coj con coo cor crb crc cre crf crj crn cro crr ebb ebc ebe ebf ebj ebn ebo ebr ec- ecb ecc ece ecf ecj ecn eco ecr eeb eec eee eef een eeo eer ef- efb efc efe eff efo efr ejc ejf ejo en- enb enc ene enf enn eno enr eo- eob eoc eoe eof eon eoo eor erb erc ere erf ern ero err fbb fbc fbe fbf fbn fbo fbr fcb fcc fce fcf fcj fcn fco fcr feb fec fee fef fen feo fer ffc ffe fff ffn ffo ffr fjb fjc fnb fnc fne fnf fnj fnn fnr fob foc foe fof fon foo for frb frc fre frf frj frn fro frr jbc jbf jbj jbo jbr jcb jcc jce jcf jco jcr jeb jec jee jef jej jen jeo jer jfb jfc jfe jff jfj jfo jfr jjb jjc jjf jjj jjr jnc jne jnf jnj jnn jno jnr job joc joe jof joj jon joo jor jrb jrc jrf jrn jro jrr nbb nbc nbe nbf nbn nbo nbr ncb ncc nce ncf ncn nco ncr ne- neb nec nee nef nej nen neo ner nfb nfc nfe nff nfn nfo nfr njc nje njf njn nnb nnc nne nnf nnn nno no- nob noc noe nof noj non noo nor nrb nrc nre nrf nrj nrn nro nrr ob- obb obc obe obf obj obn obo obr oc- ocb occ ocf ocj ocn oco ocr oeb oec oee oef oen oeo oer of- ofb ofc ofe off ofn ofo ofr ojb ojc oje ojo on- onb onc one onf onj onn ono onr oo- oob ooc oof oon ooo oor or- orb orc ore orf orn oro orr rbb rbc rbe rbf rbn rbo rbr rcb rcc rce rcf rcj rcn rco rcr re- reb rec ree ref ren reo rer rfb rfc rfe rff rfj rfn rfo rfr rjc rjf rjr rnb rnc rnn rno rnr rob roc roe rof roj ron roo ror rrb rrc rrf rrn rrr