-ic c-- ccc cci cco ccr cct ccx ci- cic cii cio cir cit cix co- coc coi coo cor cot cox crc cri cro crr crt crx ctc cti cto ctr ctt ctx cxc cxi cxo cxr cxt cxx icc ici ico icr ict iic iii iio iir iit iix io- ioc ioi ioo ior iot ir- irc iri iro irr irt irx itc iti ito itt itx ixc ixi 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 ot- otc oti oto otr ott ox- oxc oxi oxo oxt oxx rcc rci rco rcr rct rcx ric rii rio rir rit rix roc roi roo ror rot rox rrc rri rrr rrt rtc rti rto rtr rtt rtx rxr t-x tcc tci tco tcr tct tcx tic tii tio tir tit tix to- toc toi too tor tot tox trc tri tro trr trt trx ttc tti tto ttr ttt ttx txi txt xci xcr xcx xic xii xio xit xix xoc xoi xoo xor xot xox xrc xrt xrx xtc xti xtr xtx xxi xxo xxx