-ic c-- ccc cci cco ccs cct ci- cic cii cio cis cit co- coc coi coo cos cot csc csi cso css cst ctc cti cto cts ctt icc ici ico ics ict iic iii iio iis iit io- ioc ioi ioo ios iot is- isc isi iso iss ist itc iti ito its itt o-i oc- occ oci oco ocs oct oic oii oio ois oit oo- ooc ooi ooo oos oot os- osc osi oso oss ost ot- otc oti oto ots ott scc sci sco scs sct sic sii sio sis sit soc soi soo sos sot ss- ssc ssi sso sss sst stc sti sto sts stt tcc tci tco tcs tct tic tii tio tis tit to- toc toi too tos tot tsc tsi tso tss tst ttc tti tto tts ttt