m-o m-r mmm mmn mmo mmp mmr mnm mnn mno mnp mnr mom mon moo mop mor mpm mpn mpo mpp mpr mrm mrn mro mrp mrr nmm nmn nmo nmp nmr nnm nnn nno nnp no- nom non noo nop nor npm npn npo npp npr nrm nrn nro nrp nrr om- omm omn omo omp omr on- onn ono onp onr oo- oom oon ooo oop oor op- opm opn opo opp opr or- orm orn oro orp orr p-p pmm pmn pmo pmp pmr pn- pnm pnn pno pnp pnr pom pon poo pop por ppm ppn ppo ppp ppr prm prn pro prp prr rmm rmn rmo rmp rmr rnm rnn rno rnp rnr rom ron roo rop ror rpm rpn rpo rpp rpr rrm rrn rrp rrr