-er bbb bbc bbe bbh bbn bbr bcb bcc bce bch bcn bcr be- beb bec bee beh ben ber bhb bhc bhe bhh bhr bnb bnc bne bnn bnr brb bre brh brn brr c-- cbb cbc cbe cbh cbn cbr ccb ccc cce cch ccn ccr ce- ceb cec cee ceh cen cer ch- chb chc che chh chn chr cn- cnb cnc cne cnh cnn cnr crb crc cre crh crn crr ebb ebc ebe ebh ebn ebr ec- ecb ecc ece ech ecn ecr eeb eec eee een eer ehb ehc ehe ehh ehn ehr en- enb enc ene enh enn enr erb erc ere erh ern err hbb hbc hbe hbh hbn hbr hcb hcc hce hch hcn hcr he- heb hec hee heh hen her hhb hhc hhe hhh hhn hhr hnb hnc hne hnh hnn hr- hrb hrc hre hrh hrn hrr nbb nbc nbe nbn nbr ncb ncc nce nch ncn ncr ne- neb nec nee neh nen ner nhb nhc nhe nhh nhn nhr nnb nnc nne nnh nnn nrb nrc nre nrn nrr rbb rbc rbe rbh rbn rbr rcb rcc rce rch rcn rcr re- reb rec ree reh ren rer rh- rhb rhc rhe rhh rhn rhr rnb rnc rnh rnn rnr rrb rrc rrh rrn rrr