m-o mmm mmn mmo mmp mms mmt mnm mnn mno mnp mns mnt mom mon moo mop mos mot mpm mpn mpo mpp mps mpt msm msn mso msp mss mst mtm mtn mto mtp mts mtt nmm nmn nmo nmp nms nmt nnm nnn nno nnp nns nnt no- nom non noo nop nos not npm npn npo npp nps npt nsm nsn nso nsp nss nst ntm ntn nto ntp nts ntt om- omm omn omo omp oms omt on- onn ono onp ons ont oo- oom oon ooo oop oos oot op- opm opn opo opp ops opt os- osm osn oso osp oss ost ot- otm otn oto otp ots ott p-p pmm pmn pmo pmp pms pmt pn- pnm pnn pno pnp pns pnt pom pon poo pop pos pot ppm ppn ppo ppp pps ppt ps- psm psn pso psp pss pst pt- ptm ptn pto ptp pts ptt smm smn smo smp sms smt snm snn sno snp sns snt som son soo sop sos sot spm spn spo spp sps spt ss- ssm ssn sso ssp sss sst stm stn sto stp sts stt tmm tmn tmo tmp tms tmt tnm tnn tno tnp tns tnt to- tom ton too top tos tot tpm tpn tpo tpp tps tpt tsm tsn tso tsp tss tst ttm ttn tto ttp tts ttt