-er bbb bbc bbe bbf bbn bbr bbt bcb bcc bce bcf bcn bcr bct be- beb bec bee bef ben ber bet bfb bfc bfe bff bfn bfr bft bnb bnc bne bnf bnn bnr bnt brb bre brf brn brr brt btb btc bte btf btn btr btt c-- cbb cbc cbe cbf cbn cbr cbt ccb ccc cce ccf ccn ccr cct ce- ceb cec cee cef cen cer cet cfb cfc cfe cff cfn cfr cft cn- cnb cnc cne cnf cnn cnr cnt crb crc cre crf crn crr crt ctb ctc cte ctf ctn ctr ctt ebb ebc ebe ebf ebn ebr ebt ec- ecb ecc ece ecf ecn ecr ect eeb eec eee eef een eer eet ef- efb efc efe eff efr eft en- enb enc ene enf enn enr ent erb erc ere erf ern err ert etb etc ete etf etn etr ett fbb fbc fbe fbf fbn fbr fbt fcb fcc fce fcf fcn fcr fct feb fec fee fef fen fer fet ffc ffe fff ffn ffr fft fnb fnc fne fnf fnn fnr fnt frb frc fre frf frn frr frt ftb ftc fte ftf ftn ftr ftt nbb nbc nbe nbf nbn nbr nbt ncb ncc nce ncf ncn ncr nct ne- neb nec nee nef nen ner net nfb nfc nfe nff nfn nfr nft nnb nnc nne nnf nnn nnt nrb nrc nre nrf nrn nrr nrt ntb ntc nte ntf ntn ntr ntt rbb rbc rbe rbf rbn rbr rbt rcb rcc rce rcf rcn rcr rct re- reb rec ree ref ren rer ret rfb rfc rfe rff rfn rfr rft rnb rnc rnn rnr rnt rrb rrc rrf rrn rrr rrt rtb rtc rte rtf rtn rtr rtt tbb tbc tbe tbf tbn tbr tbt tcb tcc tce tcf tcn tcr tct te- teb tec tee tef ten ter tet tfb tfc tfe tff tfn tfr tft tnb tnc tne tnf tnn tnr tnt trb trc tre trf trn trr trt ttb ttc tte ttf ttn ttr ttt