c-- ccc cch ccn cco ccr ch- chc chh chn cho chr cn- cnc cnh cnn cno cnr co- coc coh con coo cor crc crh crn cro crr hcc hch hcn hco hcr hhc hhh hhn hho hhr hnc hnh hnn hno hoc hoh hon hoo hor hr- hrc hrh hrn hro hrr ncc nch ncn nco ncr nhc nhh nhn nhr nnc nnh nnn nno no- noc noh non noo nor nrc nrn nro nrr oc- occ och ocn oco ocr ohc ohh ohn oho ohr on- onc onh onn ono onr oo- ooc ooh oon ooo oor or- orc orh orn oro orr rcc rch rcn rco rcr rh- rhc rhh rhn rho rhr rnc rnh rnn rno rnr roc roh ron roo ror rrc rrh rrn rrr