a-a a-t aaa aan aao aas aat an- ana ann ano ans ant aoa aon aoo aos aot as- asa asn aso ass ast at- ata atn ato ats att naa nan nao nas nat nna nnn nno nns nnt no- noa non noo nos not nsa nsn nso nss nst nta ntn nto nts ntt oaa oan oao oas oat on- ona onn ono ons ont oo- ooa oon ooo oos oot os- osa osn oso oss ost ot- ota otn oto ots ott saa san sao sas sat sna snn sno sns snt soa son soo sos sot ss- ssa ssn sso sss sst sta stn sto sts stt taa tan tao tas tat tna tnn tno tns tnt to- toa ton too tos tot tsa tsn tso tss tst tta ttn tto tts ttt