fff ffi ffm ffp ffr fif fii fim fip fir fmf fmi fmm fmp fmr fpi fpm fpp fpr frf fri frm frp frr i-f iff ifi ifm ifp ifr iif iii iim iip iir im- imf imi imm imp ipf ipi ipm ipp ipr ir- irf iri irm irp irr m-f m-r mff mfi mfm mfp mfr mi- mif mii mim mip mir mmf mmi mmm mmp mmr mpf mpi mpm mpp mpr mrf mri mrm mrp mrr p-p pff pfi pfm pfp pfr pif pii pim pip pir pmf pmi pmm pmp pmr ppf ppi ppm ppp ppr prf pri prm prp prr rff rfi rfm rfp rfr rif rii rim rip rir rmf rmi rmm rmp rmr rpf rpi rpm rpp rpr rrf rri rrm rrp rrr