bbb bbe bbh bbo bbs bbx be- beb bee beh beo bes bex bhb bhe bhh bho bhs bhx bob boe boh boo bos box bsb bse bsh bso bss bsx bxb bxo bxx ebb ebe ebh ebo ebs ebx eeb eee eeo ees eex ehb ehe ehh eho ehs eo- eob eoe eoh eoo eos es- esb ese esh eso ess esx ex- exe exh exo exs exx hbb hbe hbh hbo hbs hbx he- heb hee heh heo hes hex hhb hhe hhh hho hhs hob hoe hoh hoo hos hox hsb hse hsh hss hsx ob- obb obe obh obo obs obx oeb oee oeh oeo oes oex ohe ohh oho ohs oo- oob ooh ooo oos oox os- osb ose osh oso oss osx ox- oxb oxo oxx sbb sbe sbh sbo sbs sbx se- seb see seh seo ses sex sh- shb she shh sho shs sob soe soh soo sos sox ss- ssb sse ssh sso sss ssx sxs xbe xbx xee xes xex xoo xos xox xsb xss xxo xxx