bbb bbd bbi bbr bbs bdb bdd bdi bdr bds bdv bi- bib bid bii bir bis biv brb brd bri brr brs brv bsb bsd bsi bsr bss bsv bvb bvd bvi bvr bvs bvv dbb dbd dbi dbr dbs dbv ddb ddd ddi ddr dds di- dib did dii dir dis div drb drd dri drr drs drv dsb dsd dsi dsr dss dsv dvb dvd dvi dvr dvs i-d i-v ibb ibd ibi ibr ibs ibv idb idd idi idr ids idv iib iid iii iir iis ir- irb ird iri irr irs irv is- isb isd isi isr iss isv ivb ivd ivi ivr ivs ivv rbb rbd rbi rbr rbs rdb rdd rdi rdr rds rdv rib rid rii rir ris riv rrb rrd rri rrr rrs rsb rsd rsi rsr rss rsv rvb rvd rvi rvr rvs rvv sbb sbd sbi sbr sbs sbv sdb sdd sdi sdr sds sdv sib sid sii sir sis siv sr- srb srd sri srr srs srv ss- ssb ssd ssi ssr sss ssv svb svd svi svr svs svv vbd vbi vbr vbs vbv vdb vdd vdi vdr vds vdv vi- vib vid vii vir vis viv vrb vrd vri vrr vrs vsb vsd vsi vsr vss vsv vvb vvi vvr vvs vvv