-ic c-- ccc cci cco ccr cct ccx ci- cic cii cio cir cit cix co- coc coi coo cor cot cox coy crc cri cro crr crt crx cry ctc cti cto ctr ctt ctx cty cxc cxi cxo cxr cxt cxx cyc cyo cyr cyt icc ici ico icr ict icy iic iii iio iir iit iix io- ioc ioi ioo ior iot ir- irc iri iro irr irt irx iry itc iti ito itt itx ity ixc ixi ixy iyc iyo iyr iyt iyy o-i oc- occ oci oco ocr oct ocx oic oii oio oir oit oo- ooc ooi ooo oor oot oox or- orc ori oro orr ort orx ory ot- otc oti oto otr ott ox- oxc oxi oxo oxt oxx oxy oyi oyo rcc rci rco rcr rct rcx ric rii rio rir rit rix riy roc roi roo ror rot rox roy rrc rri rrr rrt rtc rti rto rtr rtt rtx rty rxr ry- ryc ryo ryr ryy t-x tcc tci tco tcr tct tcx tic tii tio tir tit tix tiy to- toc toi too tor tot tox toy trc tri tro trr trt trx try ttc tti tto ttr ttt ttx tty txi txt tyc tyo tyr tyt xci xcr xcx xic xii xio xit xix xoc xoi xoo xor xot xox xrc xrt xrx xry xtc xti xtr xtx xty xxi xxo xxx xxy xyr xyy ycc yci yco ycy yii yio yir yit yoc yoi yoo yor yot yox yoy yrc yro yrt ytc yto ytr ytt yxy yyc yyt yyy