a-a a-q aaa aan aao aap aaq aas an- ana ann ano anp anq ans aoa aon aoo aop aos ap- apa apn apo app apq aps aqa aqn aqo aqp aqs as- asa asn aso asp asq ass naa nan nao nap nas nna nnn nno nnp nns no- noa non noo nop nos npa npn npo npp nps nqs nsa nsn nso nsp nss oaa oan oao oap oaq oas on- ona onn ono onp ons oo- ooa oon ooo oop oos op- opa opn opo opp opq ops oqo os- osa osn oso osp osq oss p-p paa pan pao pap paq pas pn- pna pnn pno pnp pns poa pon poo pop pos ppa ppn ppo ppp ppq pps pqq pqs ps- psa psn pso psp pss qaa qan qap qas qns qoo qop qos qpp qps qqq qsa qso qsp saa san sao sap saq sas sna snn sno snp sns soa son soo sop soq sos spa spn spo spp spq sps sqa sqn sqq sqs ss- ssa ssn sso ssp ssq sss