-er -ic bbb bbc bbd bbe bbh bbi bbo bbr bcb bcc bcd bce bch bci bco bcr bdb bdc bdd bde bdh bdi bdo bdr be- beb bec bed bee beh bei beo ber bhb bhc bhd bhe bhh bhi bho bhr bi- bib bic bid bie bih bii bio bir bob boc bod boe boh boi boo bor brb brd bre brh bri bro brr c-- cbb cbc cbd cbe cbh cbi cbo cbr ccb ccc ccd cce cch cci cco ccr cdb cdc cdd cde cdh cdi cdo cdr ce- ceb cec ced cee ceh cei ceo cer ch- chb chc chd che chh chi cho chr ci- cib cic cid cie cih cii cio cir co- cob coc cod coe coh coi coo cor crb crc crd cre crh cri cro crr dbb dbc dbd dbe dbh dbi dbo dbr dcb dcc dcd dce dci dco dcr ddb ddc ddd dde ddh ddi ddo ddr de- deb dec ded dee deh dei deo der dh- dhb dhc dhd dhe dhh dhi dho dhr di- dib dic did die dih dii dio dir dob doc dod doe doh doi doo dor drb drc drd dre dri dro drr ebb ebc ebd ebe ebh ebi ebo ebr ec- ecb ecc ecd ece ech eci eco ecr ed- edb edc edd ede edh edi edo edr eeb eec eed eee eeo eer ehb ehc ehd ehe ehh ehi eho ehr eib eic eid eie eii eio eir eo- eob eoc eod eoe eoh eoi eoo eor erb erc erd ere erh eri ero err h-i hbb hbc hbd hbe hbh hbi hbo hbr hcb hcc hcd hce hch hci hco hcr hdb hdc hdd hde hdh hdi hdo hdr he- heb hec hed hee heh hei heo her hhb hhc hhd hhe hhh hhi hho hhr hib hic hid hie hih hii hio hir hob hoc hod hoe hoh hoi hoo hor hr- hrb hrc hrd hre hrh hri hro hrr i-d ibb ibc ibd ibe ibh ibi ibo ibr icb icc icd ice ich ici ico icr idb idc idd ide idh idi ido idr ie- iec ied iee iei ier ihb ihc ihd ihe ihh ihi iho ihr iib iic iid iie iih iii iio iir io- iob ioc iod ioe ioh ioi ioo ior ir- irb irc ird ire iri iro irr o-i ob- obb obc obd obe obh obi obo obr oc- ocb occ ocd och oci oco ocr odb odc odd ode odh odi odo odr oeb oec oed oee oeh oei oeo oer ohc ohd ohe ohh ohi oho ohr oib oic oid oie oii oio oir oo- oob ooc ood ooh ooi ooo oor or- orb orc ord ore orh ori oro orr rbb rbc rbd rbe rbh rbi rbo rbr rcb rcc rcd rce rch rci rco rcr rdb rdc rdd rde rdh rdi rdo rdr re- reb rec red ree reh rei reo rer rh- rhb rhc rhd rhe rhh rhi rho rhr rib ric rid rie rih rii rio rir rob roc rod roe roh roi roo ror rrb rrc rrd rrh rri rrr