-er -th bbb bbc bbe bbh bbl bbr bbt bcb bcc bce bch bcl bcr bct be- beb bec bee beh bel ber bet bhb bhc bhe bhh bhl bhr bht blb blc ble blh bll blr blt brb bre brh brl brr brt btb btc bte bth btl btr btt c-- cbb cbc cbe cbh cbl cbr cbt ccb ccc cce cch ccl ccr cct ce- ceb cec cee ceh cel cer cet ch- chb chc che chh chl chr cht cl- clb clc cle clh cll clr clt crb crc cre crh crl crr crt ctb ctc cte cth ctl ctr ctt ebb ebc ebe ebh ebl ebr ebt ec- ecb ecc ece ech ecl ecr ect eeb eec eee eel eer eet ehb ehc ehe ehh ehl ehr eht elb elc ele elh ell elr elt erb erc ere erh erl err ert etb etc ete eth etl etr ett hbb hbc hbe hbh hbl hbr hbt hcb hcc hce hch hcl hcr hct he- heb hec hee heh hel her het hhb hhc hhe hhh hhl hhr hht hlb hlc hle hlh hll hlr hlt hr- hrb hrc hre hrh hrl hrr hrt htb htc hte hth htl htr htt lbb lbc lbe lbh lbl lbr lbt lcb lcc lce lch lcl lcr lct leb lec lee leh lel ler let lhb lhc lhh lhr lht llb llc lle lll llr llt lrb lrc lrh lrr lrt ltb ltc lte lth ltl ltr ltt rbb rbc rbe rbh rbl rbr rbt rcb rcc rce rch rcl rcr rct re- reb rec ree reh rel rer ret rh- rhb rhc rhe rhh rhl rhr rht rlc rle rlh rll rlr rlt rrb rrc rrh rrl rrr rrt rtb rtc rte rtl rtr rtt tbb tbc tbe tbh tbl tbr tbt tcb tcc tce tch tcl tcr tct te- teb tec tee teh tel ter tet th- thb thc the thh thl thr tht tlc tle tlh tll tlr tlt trb trc tre trh trl trr trt ttb ttc tte tth ttl ttr ttt