-er -ic -ji bbb bbc bbe bbi bbo bbr bcb bcc bce bci bcj bco bcr be- beb bec bee bei beo ber bi- bib bic bie bii bij bio bir bjc bji bjj bjr bob boc boe boi boj boo bor brb bre bri brj bro brr c-- c-j cbb cbc cbe cbi cbj cbo cbr ccb ccc cce cci ccj cco ccr ce- ceb cec cee cei cej ceo cer ci- cib cic cie cii cij cio cir cjb cjc cjr co- cob coc coe coi coj coo cor crb crc cre cri crj cro crr ebb ebc ebe ebi ebj ebo ebr ec- ecb ecc ece eci ecj eco ecr eeb eec eee eeo eer eib eic eie eii eij eio eir ejc eji ejo eo- eob eoc eoe eoi eoo eor erb erc ere eri ero err ibb ibc ibe ibi ibj ibo ibr icb icc ice ici icj ico icr ie- iec iee iei iej ier iib iic iie iii iij iio iir ijb ijc ije iji ijo io- iob ioc ioe ioi ioj ioo ior ir- irb irc ire iri irj iro irr j-i jbc jbi jbj jbo jbr jcb jcc jce jci jco jcr jeb jec jee jei jej jeo jer jib jic jie jii jij jio jir jjb jjc jjj jjr job joc joe joi joj joo jor jrb jrc jri jro jrr o-i ob- obb obc obe obi obj obo obr oc- ocb occ oci ocj oco ocr oeb oec oee oei oeo oer oib oic oie oii oio oir ojb ojc oje oji ojo oo- oob ooc ooi ooo oor or- orb orc ore ori oro orr rbb rbc rbe rbi rbo rbr rcb rcc rce rci rcj rco rcr re- reb rec ree rei reo rer rib ric rie rii rio rir rjc rjr rob roc roe roi roj roo ror rrb rrc rri rrr