b-u bbb bbn bbo bbs bbu bby bnb bnn bno bns bnu bob bon boo bos bou boy bsb bsn bso bss bsu bsy bub bun buo bus buu buy by- byn byo bys byu nbb nbn nbo nbs nbu nnb nnn nno nns nnu no- nob non noo nos nou noy nsb nsn nso nss nsu nsy nub nun nuo nus nuu nuy nyn nyo nys nyu nyy ob- obb obn obo obs obu oby on- onb onn ono ons onu ony oo- oob oon ooo oos os- osb osn oso oss osu ou- oun ouo ous oyo oys sbb sbn sbo sbs sbu sby snb snn sno sns snu sny sob son soo sos sou soy ss- ssb ssn sso sss ssu sub sun suo sus suu suy sy- syb syn sys syu ubb ubn ubo ubs ubu uby un- unb unn uno uns unu uny uob uon uoo uos usb usn uso uss usu uun uus uuu uyo uys uyu ybs yby ynn yns ynu yny yob yon yoo yos you yoy ysb yso yss ysu ysy yun yuo yus yuu yuy yyb yys yyu yyy