-er bbb bbc bbe bbg bbh bbr bcb bcc bce bcg bch bcr be- beb bec bee beg beh ber bgb bgc bge bgg bgh bgr bhb bhc bhe bhg bhh bhr brb bre brg brh brr c-- cbb cbc cbe cbg cbh cbr ccb ccc cce ccg cch ccr ce- ceb cec cee ceg ceh cer cgb cgc cge cgg cgh cgr ch- chb chc che chg chh chr crb crc cre crg crh crr ebb ebc ebe ebg ebh ebr ec- ecb ecc ece ecg ech ecr eeb eec eee eeg eer egb egc ege egg egh egr ehb ehc ehe ehg ehh ehr erb erc ere erg erh err gbc gbe gbg gbh gbr gcb gcc gce gcg gch gcr ge- geb gec gee geg geh ger ggb ggc ggg ggh ggr ghb ghc ghe ghg ghh ghr grb grc gre grg grh grr hbb hbc hbe hbg hbh hbr hcb hcc hce hcg hch hcr he- heb hec hee heg heh her hgb hgc hge hgg hgh hgr hhb hhc hhe hhg hhh hhr hr- hrb hrc hre hrg hrh hrr rbb rbc rbe rbg rbh rbr rcb rcc rce rcg rch rcr re- reb rec ree reg reh rer rgb rgc rge rgg rgh rgr rh- rhb rhc rhe rhg rhh rhr rrb rrc rrg rrh rrr