-ic c-- ccc cci cco ccs cct ccu ccx ci- cic cii cio cis cit ciu cix co- coc coi coo cos cot cou cox coy csc csi cso css cst csu csx csy ctc cti cto cts ctt ctu ctx cty cuc cui cuo cus cut cuu cuy cxc cxi cxo cxs cxt cxx cyc cyo cys cyt icc ici ico ics ict icu icy iic iii iio iis iit iiu iix io- ioc ioi ioo ios iot iou is- isc isi iso iss ist isu isy itc iti ito its itt itu itx ity iu- iuc iui ius iut ixc ixi ixy iyc iyo iys iyt iyy o-i oc- occ oci oco ocs oct ocu ocx oic oii oio ois oit oiu oo- ooc ooi ooo oos oot oox os- osc osi oso oss ost osu osx ot- otc oti oto ots ott otu ou- ouc oui ouo ous out ox- oxc oxi oxo oxt oxx oxy oyi oyo oys scc sci sco scs sct scu scx sic sii sio sis sit siu six soc soi soo sos sot sou sox soy ss- ssc ssi sso sss sst ssu ssx stc sti sto sts stt stu stx sty suc sui suo sus sut suu sux suy sxc sxi sxs sxt sxu sy- syc syi sys syt syu syx t-x tcc tci tco tcs tct tcu tcx tic tii tio tis tit tiu tix tiy to- toc toi too tos tot tou tox toy tsc tsi tso tss tst tsu tsx tsy ttc tti tto tts ttt ttu ttx tty tuc tui tuo tus tut tuu tux tuy txi txs txt txu tyc tyo tys tyt ucc uci uco ucs uct ucu uic uii uio uis uit uiu uoc uoo uos uot uox usc usi uso uss ust usu usx utc uti uto uts utt utu utx uty uuc uus uut uuu uxc uxo uxt uxu uyc uyi uyo uys uyu xci xcx xic xii xio xis xit xiu xix xoc xoi xoo xos xot xox xsc xsi xss xst xtc xti xts xtx xty xui xus xxi xxo xxx xxy xyy ycc yci yco ycs ycu ycy yii yio yis yit yoc yoi yoo yos yot you yox yoy ysc ysi yso yss yst ysu ysy ytc yto yts ytt ytu yui yuo yus yut yuu yux yuy yxy yyc yys yyt yyu yyy