70. In a football match, each team has 11 players on the field, including 1 goalkeeper who does not participate in the formation of defenders, midfielders, and forwards. It is known that the number of defenders is between 3 to 5, the number of midfielders is between 3 to 6, and the number of forwards is between 1 to 3. Therefore, according to the number of defenders, midfielders, and forwards, there are $\qquad$ formations.
Answer: 8