bbb bbd bbo bbs bby bdb bdd bdo bds bdy bob bod boo bos boy bsb bsd bso bss bsy by- byd byo bys dbb dbd dbo dbs dby ddb ddd ddo dds ddy dob dod doo dos doy dsb dsd dso dss dsy dy- dyb dyd dyo dys dyy ob- obb obd obo obs oby odb odd odo ods oo- oob ood ooo oos os- osb osd oso oss oyd oyo oys sbb sbd sbo sbs sby sdb sdd sdo sds sdy sob sod soo sos soy ss- ssb ssd sso sss sy- syb syd sys ybs yby ydo yds ydy yob yod yoo yos yoy ysb yso yss ysy yyb yys yyy