a-a aaa aad aaf aao aas aav ad- ada add adf ado ads adv af- afa afd aff afo afs afv aoa aod aof aoo aos aov as- asa asd asf aso ass asv av- ava avd avf avo avs daa dad daf dao das dav dda ddd ddf ddo dds dfa dfd dff dfo dfs dfv doa dod dof doo dos dov dsa dsd dsf dso dss dsv dva dvd dvs faa fad faf fao fas fav fda fdd fdf fdo fds ffa ffd fff ffo ffs ffv foa fof foo fos fsa fsd fsf fso fss fsv fva fvd oaa oad oaf oao oas oav oda odd odf odo ods odv of- ofa ofd off ofo ofs ofv oo- ooa ood oof ooo oos oov os- osa osd osf oso oss osv ov- ova ovd ovf ovo ovs ovv saa sad saf sao sas sav sda sdd sdf sdo sds sdv sfa sfd sff sfo sfs sfv soa sod sof soo sos sov ss- ssa ssd ssf sso sss ssv sva svd svf svo svs svv v-a vaa vad vao vas vav vdd vdf vdo vds vdv vfa vfd vff vfs vfv voa vod vof voo vos vov vsa vsd vsf vso vss vsv vva vvo vvs vvv