-er bbb bbc bbd bbe bbh bbk bbr bcb bcc bcd bce bch bck bcr bdb bdc bdd bde bdh bdk bdr be- beb bec bed bee beh bek ber bhb bhc bhd bhe bhh bhk bhr bkb bkc bke bkk bkr brb brd bre brh brk brr c-- cbb cbc cbd cbe cbh cbk cbr ccb ccc ccd cce cch cck ccr cdb cdc cdd cde cdh cdk cdr ce- ceb cec ced cee ceh cek cer ch- chb chc chd che chh chk chr ckb ckc ckd ckh crb crc crd cre crh crk crr dbb dbc dbd dbe dbh dbk dbr dcb dcc dcd dce dck dcr ddb ddc ddd dde ddh ddk ddr de- deb dec ded dee deh dek der dh- dhb dhc dhd dhe dhh dhk dhr dkb dkc dke dkk dkr drb drc drd dre drk drr ebb ebc ebd ebe ebh ebk ebr ec- ecb ecc ecd ece ech eck ecr ed- edb edc edd ede edh edk edr eeb eec eed eee eek eer ehb ehc ehd ehe ehh ehr ekb ekc ekd eke ekh ekr erb erc erd ere erh erk err hbb hbc hbd hbe hbh hbk hbr hcb hcc hcd hce hch hck hcr hdb hdc hdd hde hdh hdk hdr he- heb hec hed hee heh hek her hhb hhc hhd hhe hhh hhk hhr hkb hkd hkh hkk hkr hr- hrb hrc hrd hre hrh hrk hrr kbb kbc kbd kbe kbh kbk kbr kcb kcc kcd kce kch kck kcr kdb kdc kde kdh kdk kdr ke- keb kec ked kee keh kek ker khe khh khk khr kkb kkc kke kkh kkk kkr krc krd krk krr rbb rbc rbd rbe rbh rbk rbr rcb rcc rcd rce rch rcr rdb rdc rdd rde rdh rdr re- reb rec red ree reh rek rer rh- rhb rhc rhd rhe rhh rhr rkb rkc rke rkk rrb rrc rrd rrh rrk rrr