2. Each card has a number on one side and a letter on the other side (two cards that have the same letter on one side do not necessarily have the same number on the other side, and vice versa). On the table, there are cards that show the following on their visible side:

$$
M, A, T, E, M, A, T, И, K, A, 2,0,1,8
$$

Vlada claims the following: "If a card has a vowel, then the other side has an even number." Miljan wants to check Vlada's claim. How many and which cards does he need to turn over to verify the correctness of the statement?
2. Miljan needs to flip the cards with vowels: $A, E, A, И, A$, and ensure that there is an even number on the other side. He also needs to flip the card with the number 1 and ensure that there is a consonant on the other side (if there were a vowel on the other side, that card would be a counterexample to Vlad's claim). Therefore, he needs to flip at least 6 cards.