c-- ccc cch ccp ccs ch- chc chh chp chs chy cpc cph cpp cps csc csh csp css csy cyc cyp cys hcc hch hcp hcs hcy hhc hhh hhp hhs hhy hpc hph hpp hps hpy hsc hsh hsp hss hsy hy- hyc hyh hyp hys hyy p-p pcc pch pcp pcs phc php phs phy ppc pph ppp pps ps- psc psh psp pss psy py- pyc pys scc sch scp scs sh- shc shh shp shs shy spc sph spp sps spy ss- ssc ssh ssp sss sy- syc syh syp sys ycc ych ycp ycs ycy yhc yhs yps ysc ysp yss ysy yyc yys yyy