def most_common_cards(deck, k):
    deck.sort(key = lambda deck: deck[0], reverse=True)
    return [card[1] for card in deck[:k]]  

def decks_by_label(a_label):
    return [(deck, label) for (deck, label) in decks_labels if label == a_label]
  
k = 7
N = 10
for deck, label in decks_by_label(0)[:N]:
    print(str(most_common_cards(deck, k))+" "+ str(label))