a-a a-i aaa aaf aai aam aas af- afa aff afi afm afs ai- aia aif aii aim ais ama amf ami amm ams as- asa asf asi asm ass faa faf fai fam fas ffa fff ffi ffm ffs fia fif fii fim fis fma fmf fmi fmm fms fsa fsf fsi fsm fss i-f ia- iaa iaf iai iam ias ifa iff ifi ifm ifs iia iif iii iim iis im- ima imf imi imm ims is- isa isf isi ism iss m-f maa maf mai mam mas mfa mff mfi mfm mfs mi- mia mif mii mim mis mma mmf mmi mmm mms msa msf msi msm mss saa saf sai sam sas sfa sff sfi sfm sfs sia sif sii sim sis sma smf smi smm sms ss- ssa ssf ssi ssm sss