a-a a-b a-i aaa aab aai aan aao aas aav ab- aba abb abi abn abo abs abv ai- aia aib aii ain aio ais aiv an- ana anb ani ann ano ans anv aoa aob aoi aon aoo aos aov as- asa asb asi asn aso ass asv av- ava avb avi avn avo avs baa bab bai ban bao bas bav bba bbb bbi bbn bbo bbs bi- bia bib bii bin bio bis biv bna bnb bni bnn bno bns bnv boa bob boi bon boo bos bov bsa bsb bsi bsn bso bss bsv bva bvb bvi bvn bvo bvs bvv i-v ia- iaa iab iai ian iao ias iav iba ibb ibi ibn ibo ibs ibv iia iib iii iin iio iis in- ina inb ini inn ino ins inv io- ioa iob ioi ion ioo ios iov is- isa isb isi isn iso iss isv iva ivb ivi ivo ivs ivv n-i naa nab nai nan nao nas nav nba nbb nbi nbn nbo nbs nbv nia nib nii nin nio nis niv nna nnb nni nnn nno nns nnv no- noa nob noi non noo nos nov nsa nsb nsi nsn nso nss nsv nva nvb nvi nvn nvv o-i oaa oab oai oan oao oas oav ob- oba obb obi obn obo obs obv oia oib oii oin oio ois oiv on- ona onb oni onn ono ons oo- ooa oob ooi oon ooo oos oov os- osa osb osi osn oso oss osv ov- ova ovb ovi ovo ovs ovv saa sab sai san sao sas sav sba sbb sbi sbn sbo sbs sbv sia sib sii sin sio sis siv sna snb sni snn sno sns snv soa sob soi son soo sos sov ss- ssa ssb ssi ssn sso sss ssv sva svb svi svn svo svs svv v-a vaa vab vai van vao vas vav vba vbi vbo vbs vbv vi- via vib vii vin vio vis viv vn- vna vni vno vns vnv voa vob voi von voo vos vov vsa vsb vsi vsn vso vss vsv vva vvb vvi vvo vvs vvv