-ic c-- ccc cci cco ccs cct ccx ci- cic cii cio cis cit cix co- coc coi coo cos cot cox coy csc csi cso css cst csx csy ctc cti cto cts ctt ctx cty cxc cxi cxo cxs cxt cxx cyc cyo cys cyt icc ici ico ics ict icy iic iii iio iis iit iix io- ioc ioi ioo ios iot is- isc isi iso iss ist isy itc iti ito its itt itx ity ixc ixi ixy iyc iyo iys iyt iyy o-i oc- occ oci oco ocs oct ocx oic oii oio ois oit oo- ooc ooi ooo oos oot oox os- osc osi oso oss ost osx ot- otc oti oto ots ott ox- oxc oxi oxo oxt oxx oxy oyi oyo oys scc sci sco scs sct scx sic sii sio sis sit six soc soi soo sos sot sox soy ss- ssc ssi sso sss sst ssx stc sti sto sts stt stx sty sxc sxi sxs sxt sy- syc syi sys syt syx t-x tcc tci tco tcs tct tcx tic tii tio tis tit tix tiy to- toc toi too tos tot tox toy tsc tsi tso tss tst tsx tsy ttc tti tto tts ttt ttx tty txi txs txt tyc tyo tys tyt xci xcx xic xii xio xis xit xix xoc xoi xoo xos xot xox xsc xsi xss xst xtc xti xts xtx xty xxi xxo xxx xxy xyy ycc yci yco ycs ycy yii yio yis yit yoc yoi yoo yos yot yox yoy ysc ysi yso yss yst ysy ytc yto yts ytt yxy yyc yys yyt yyy