a-a aaa aam aan aao aap ama amm amn amo amp an- ana anm ann ano anp aoa aom aon aoo aop ap- apa apm apn apo app m-o maa mam man mao map mma mmm mmn mmo mmp mna mnm mnn mno mnp moa mom mon moo mop mpa mpm mpn mpo mpp naa nam nan nao nap nma nmm nmn nmo nmp nna nnm nnn nno nnp no- noa nom non noo nop npa npm npn npo npp oaa oam oan oao oap om- oma omm omn omo omp on- ona onn ono onp oo- ooa oom oon ooo oop op- opa opm opn opo opp p-p paa pam pan pao pap pma pmm pmn pmo pmp pn- pna pnm pnn pno pnp poa pom pon poo pop ppa ppm ppn ppo ppp