c-- ccc cch cco ccr ccv ch- chc chh cho chr chv co- coc coh coo cor cov crc crh cro crr crv cvc cvh cvo cvr cvv hcc hch hco hcr hcv hhc hhh hho hhr hhv hoc hoh hoo hor hov hr- hrc hrh hro hrr hrv hv- hvc hvo hvr hvv oc- occ och oco ocr ocv ohc ohh oho ohr oo- ooc ooh ooo oor oov or- orc orh oro orr orv ov- ovc ovh ovo ovv rcc rch rco rcr rcv rh- rhc rhh rho rhr rhv roc roh roo ror rov rrc rrh rrr rvc rvh rvo rvr rvv vcc vch vco vcr vh- vhc vho voc voh voo vor vov vrc vrh vrr vvc vvo vvr vvv