a-a a-t aaa aaf aap aas aat af- afa aff afp afs aft ap- apa apf app aps apt as- asa asf asp ass ast at- ata atf atp ats att faa faf fap fas fat ffa fff ffp ffs fft fpa fpp fps fpt fsa fsf fsp fss fst fta ftf ftp fts ftt p-p paa paf pap pas pat pfa pff pfp pfs pft ppa ppf ppp pps ppt ps- psa psf psp pss pst pt- pta ptf ptp pts ptt saa saf sap sas sat sfa sff sfp sfs sft spa spf spp sps spt ss- ssa ssf ssp sss sst sta stf stp sts stt taa taf tap tas tat tfa tff tfp tfs tft tpa tpf tpp tps tpt tsa tsf tsp tss tst tta ttf ttp tts ttt