-ey c-- ccc ccd cce cck cco ccs cdc cdd cde cdk cdo cds cdy ce- cec ced cee cek ceo ces cey ckc ckd cko cks cky co- coc cod coe cok coo cos coy csc csd cse csk cso css csy cyc cyd cye cyk cyo cys dcc dcd dce dck dco dcs ddc ddd dde ddk ddo dds ddy de- dec ded dee dek deo des dey dkc dke dkk dko dks doc dod doe dok doo dos doy dsc dsd dse dsk dso dss dsy dy- dyc dyd dye dyk dyo dys dyy ec- ecc ecd ece eck eco ecs ed- edc edd ede edk edo eds edy eec eed eee eek eeo ees eey ekc ekd eke eko eks eky eo- eoc eod eoe eok eoo eos es- esc esd ese esk eso ess esy eyc eyd eye eyo eys kcc kcd kce kck kcs kdc kde kdk kdo kds kdy ke- kec ked kee kek keo kes key kkc kke kkk kks kky koc kod koe kok koo kos koy ksc ksd kse ksk kso kss kyc kyd kye kyo kys oc- occ ocd ock oco ocs odc odd ode odo ods oec oed oee oeo oes oey okc okd oke okk oko oks oo- ooc ood ook ooo oos os- osc osd ose osk oso oss oyd oye oyo oys scc scd sce sck sco scs sdc sdd sde sdk sdo sds sdy se- sec sed see sek seo ses sey sk- skc skd ske skk sko sks sky soc sod soe sok soo sos soy ss- ssc ssd sse ssk sso sss sy- syc syd sye syk sys ycc ycd yce yco ycs ycy yde ydo yds ydy yec yed yee yek yeo yes yey ykk yoc yod yoe yok yoo yos yoy ysc yse ysk yso yss ysy yyc yye yys yyy