-er bbb bbd bbe bbi bbr bbs bdb bdd bde bdi bdr bds bdv be- beb bed bee bei ber bes bev bi- bib bid bie bii bir bis biv brb brd bre bri brr brs brv bsb bsd bse bsi bsr bss bsv bvb bvd bve bvi bvr bvs bvv dbb dbd dbe dbi dbr dbs dbv ddb ddd dde ddi ddr dds de- deb ded dee dei der des dev di- dib did die dii dir dis div drb drd dre dri drr drs drv dsb dsd dse dsi dsr dss dsv dvb dvd dve dvi dvr dvs ebb ebd ebe ebi ebr ebs ebv ed- edb edd ede edi edr eds eeb eed eee eer ees eev eib eid eie eii eir eis eiv erb erd ere eri err ers erv es- esb esd ese esi esr ess esv evb evd eve evi evr evs evv i-d i-v ibb ibd ibe ibi ibr ibs ibv idb idd ide idi idr ids idv ie- ied iee iei ier ies iev iib iid iie iii iir iis ir- irb ird ire iri irr irs irv is- isb isd ise isi isr iss isv ivb ivd ive ivi ivr ivs ivv rbb rbd rbe rbi rbr rbs rdb rdd rde rdi rdr rds rdv re- reb red ree rei rer res rev rib rid rie rii rir ris riv rrb rrd rri rrr rrs rsb rsd rse rsi rsr rss rsv rvb rvd rve rvi rvr rvs rvv sbb sbd sbe sbi sbr sbs sbv sdb sdd sde sdi sdr sds sdv se- seb sed see sei ser ses sev sib sid sie sii sir sis siv sr- srb srd sre sri srr srs srv ss- ssb ssd sse ssi ssr sss ssv svb svd sve svi svr svs svv v-e vbd vbi vbr vbs vbv vdb vdd vde vdi vdr vds vdv veb ved vee vei ver ves vi- vib vid vie vii vir vis viv vrb vrd vre vri vrr vrs vsb vsd vse vsi vsr vss vsv vvb vvi vvr vvs vvv