fff ffm ffn ffo ffp ffr fft fmf fmm fmn fmo fmp fmr fmt fnf fnm fnn fnp fnr fnt fof fom fon foo fop for fot fpm fpn fpo fpp fpr fpt frf frm frn fro frp frr frt ftf ftm ftn fto ftp ftr ftt m-f m-o m-r mff mfm mfn mfo mfp mfr mft mmf mmm mmn mmo mmp mmr mmt mnf mnm mnn mno mnp mnr mnt mof mom mon moo mop mor mot mpf mpm mpn mpo mpp mpr mpt mrf mrm mrn mro mrp mrr mrt mtf mtm mtn mto mtp mtr mtt nff nfn nfo nfp nfr nft nmm nmn nmo nmp nmr nmt nnf nnm nnn nno nnp nnt no- nof nom non noo nop nor not npf npm npn npo npp npr npt nrf nrm nrn nro nrp nrr nrt ntf ntm ntn nto ntp ntr ntt of- off ofm ofn ofo ofp ofr oft om- omf omm omn omo omp omr omt on- onf onn ono onp onr ont oo- oof oom oon ooo oop oor oot op- opf opm opn opo opp opr opt or- orf orm orn oro orp orr ort ot- otf otm otn oto otp otr ott p-p pff pfm pfn pfo pfp pfr pft pmf pmm pmn pmo pmp pmr pmt pn- pnf pnm pnn pno pnp pnr pnt pof pom pon poo pop por pot ppf ppm ppn ppo ppp ppr ppt prf prm prn pro prp prr prt pt- ptf ptm ptn pto ptp ptr ptt rff rfm rfn rfo rfp rfr rft rmf rmm rmn rmo rmp rmr rmt rnm rnn rno rnp rnr rnt rof rom ron roo rop ror rot rpf rpm rpn rpo rpp rpr rpt rrf rrm rrn rrp rrr rrt rtf rtm rtn rto rtp rtr rtt tff tfm tfn tfo tfp tfr tft tmf tmm tmn tmo tmp tmr tmt tnf tnm tnn tno tnp tnr tnt to- tof tom ton too top tor tot tpf tpm tpn tpo tpp tpr tpt trf trm trn tro trp trr trt ttf ttm ttn tto ttp ttr ttt