In the second example, it is incorrectly in the accusative case. Proclitics are words pronounced so closely with the following word that they have no accent of their own. Because of the rule that only the last three syllables of a word can be accented, enclitics create special problems. If the preceding word is accented on the antepenult, a one syllable enclitic pronounced with it would have the effect of creating a word with at least four syllables having no accent on any of the last three syllables. The same problem would arise if a two syllable enclitic is pronounced with a preceding word that is accented on the penult.
Special rules provide for adding accents in such cases.
Refer to your text book, p. 23. If the word before an enclitic is itself a proclitic or an enclitic, the first of the two acquires an acute on the ultima. They are shown with the accent marks they would acquire in the circumstances described in the rules on p. 23 of your text book. Summary of Lesson 3 Nouns have number, case, and gender These attributes are indicated by noun endings A declension is a pattern of such endings Most nouns of the 2nd declension are masculine or neuter For nouns, the accent mark stays as close to its position in the nominative singular form as the general rules of accent allow. For 2nd declension nouns, if the genitive or dative in either number is accented on the ultima, the accent must be a circumflex.