nsi nsl nsm nsn nso nsp nss o-i oaa oac oad oae oai oal oam oan oao oap oas oc- oca occ ocd oci ocl ocm ocn oco ocp ocs oda odc odd ode odi odl odm odn odo odp ods oea oec oed oee oei oel oem oen oeo oep oes oia oic oid oie oii oil oim oin oio oip ois ola olc old ole oli oll olm oln olo olp ols om- oma omc omd ome omi oml omm omn omo omp oms on- ona onc ond one oni onl onn ono onp ons oo- ooa ooc ood ooi ool oom oon ooo oop oos op- opa opc opd ope opi opl opm opn opo opp ops os- osa osc osd ose osi osl osm osn oso osp oss p-p paa pac pad pae pai pal pam pan pao pap pas pca pcc pcd pce pci pcl pcm pcn pco pcp pcs pda pdc pdd pde pdi pdl pdm pdn pdo pdp pds pea pec ped pee pei pel pem pen peo pep pes pia pic pid pie pii pil pim pin pio pip pis pla plc pld ple pli pll plm pln plo plp pls pma pmc pmd pme pmi pml pmm pmn pmo pmp pms pn- pna pnc pnd pne pni pnl pnm pnn pno pnp pns poa poc pod poe poi pol pom pon poo pop pos ppa ppc ppd ppe ppi ppl ppm ppn ppo ppp pps ps- psa psc psd pse psi psl psm psn pso psp pss saa sac sad sae sai sal sam san sao sap sas sca scc scd sce sci scl scm scn sco scp scs sda sdc sdd sde sdi sdl sdm sdn sdo sdp sds se- sea sec sed see sei sel sem sen seo sep ses sia sic sid sie sii sil sim sin sio sip sis sla slc sld sle sli sll slm sln slo slp sls sma smc smd sme smi sml smm smn smo smp sms sna snc snd sne sni snl snm snn sno snp sns soa soc sod soe soi sol som son soo sop sos spa spc spd spe spi spl spm spn spo spp sps ss- ssa ssc ssd sse ssi ssl ssm ssn sso ssp sss