Obviously, the seven of coins is the most valuable card in the deck, as it alone contributes to all the four points. A player or team can win the "prime" even with only one seven but other useful cards. If one player has three sevens (3x21) and no cards of the fourth suit (sum=63), their opponent can win the "prime" with one seven (21) and three aces (3x16), for their sum would be 69. Therefore, it is a common tactic, while playing the game, to capture aces and sixes whenever possible.