For the -uo words (except mėnuo) and the -is words (like dantis) the shift to the other declensions would be a mistake. When the shift is from the fifth to the third declension it can be understood as minor variation, but the shift to the first declension would be a clear mistake (however, some of the cases are the same, and that is one of the reasons why the shift can occur). But in speech some of the speakers say, for example, rudenio instead of rudens (this can come on dialectal base), dantis, dančio instead of dantis, danties. Besides these cases, there are shifts, which occur commonly in a speech: pačio instead of paties, pečio instead of peties (the original variants are not used less). A word šuo can also be said šuva (one of dialectal variants).