bbb bbd bbe bbo bbs bbx bdb bdd bde bdo bds bdx be- beb bed bee beo bes bex bob bod boe boo bos box bsb bsd bse bso bss bsx bxb bxd bxo bxx dbb dbd dbe dbo dbs dbx ddb ddd dde ddo dds ddx de- deb ded dee deo des dex dob dod doe doo dos dox dsb dsd dse dso dss dsx dxd dxo dxs dxx ebb ebd ebe ebo ebs ebx ed- edb edd ede edo eds edx eeb eed eee eeo ees eex eo- eob eod eoe eoo eos es- esb esd ese eso ess esx ex- exd exe exo exs exx ob- obb obd obe obo obs obx odb odd ode odo ods oeb oed oee oeo oes oex oo- oob ood ooo oos oox os- osb osd ose oso oss osx ox- oxb oxo oxx sbb sbd sbe sbo sbs sbx sdb sdd sde sdo sds se- seb sed see seo ses sex sob sod soe soo sos sox ss- ssb ssd sse sso sss ssx sxs xbe xbx xdb xde xds xed xee xes xex xod xoo xos xox xsb xss xxo xxx