iii iim iio iip iis im- imi imm imo imp ims imy io- ioi iom ioo iop ios ipi ipm ipo ipp ips ipy is- isi ism iso isp iss isy iym iyo iys iyy m-o mi- mii mim mio mip mis miy mmi mmm mmo mmp mms moi mom moo mop mos moy mpi mpm mpo mpp mps msi msm mso msp mss msy my- mym myo mys o-i oii oim oio oip ois om- omi omm omo omp oms omy oo- ooi oom ooo oop oos op- opi opm opo opp ops opy os- osi osm oso osp oss oyi oyo oys p-p pii pim pio pip pis pmi pmm pmo pmp pms poi pom poo pop pos poy ppi ppm ppo ppp pps ps- psi psm pso psp pss psy py- pym pyo pys sii sim sio sip sis smi smm smo smp sms smy soi som soo sop sos soy spi spm spo spp sps spy ss- ssi ssm sso ssp sss sy- syi sym syp sys yii yim yio yip yis ymi ymm ymo yms yoi yom yoo yop yos yoy ypo yps ysi ysm yso ysp yss ysy yys yyy