-er -ic bbb bbc bbe bbh bbi bbo bbr bcb bcc bce bch bci bco bcr be- beb bec bee beh bei beo ber bhb bhc bhe bhh bhi bho bhr bi- bib bic bie bih bii bio bir bob boc boe boh boi boo bor brb bre brh bri bro brr c-- cbb cbc cbe cbh cbi cbo cbr ccb ccc cce cch cci cco ccr ce- ceb cec cee ceh cei ceo cer ch- chb chc che chh chi cho chr ci- cib cic cie cih cii cio cir co- cob coc coe coh coi coo cor crb crc cre crh cri cro crr ebb ebc ebe ebh ebi ebo ebr ec- ecb ecc ece ech eci eco ecr eeb eec eee eeo eer ehb ehc ehe ehh ehi eho ehr eib eic eie eii eio eir eo- eob eoc eoe eoh eoi eoo eor erb erc ere erh eri ero err h-i hbb hbc hbe hbh hbi hbo hbr hcb hcc hce hch hci hco hcr he- heb hec hee heh hei heo her hhb hhc hhe hhh hhi hho hhr hib hic hie hih hii hio hir hob hoc hoe hoh hoi hoo hor hr- hrb hrc hre hrh hri hro hrr ibb ibc ibe ibh ibi ibo ibr icb icc ice ich ici ico icr ie- iec iee iei ier ihb ihc ihe ihh ihi iho ihr iib iic iie iih iii iio iir io- iob ioc ioe ioh ioi ioo ior ir- irb irc ire iri iro irr o-i ob- obb obc obe obh obi obo obr oc- ocb occ och oci oco ocr oeb oec oee oeh oei oeo oer ohc ohe ohh ohi oho ohr oib oic oie oii oio oir oo- oob ooc ooh ooi ooo oor or- orb orc ore orh ori oro orr rbb rbc rbe rbh rbi rbo rbr rcb rcc rce rch rci rco rcr re- reb rec ree reh rei reo rer rh- rhb rhc rhe rhh rhi rho rhr rib ric rie rih rii rio rir rob roc roe roh roi roo ror rrb rrc rrh rri rrr