80. Place the 81 natural numbers from 1 to 81 randomly on a circle. After counting the parity of all adjacent 3 numbers, it is found that there are 25 groups where all 3 numbers are odd, and 17 groups where exactly 2 numbers are odd. Therefore, the number of groups with exactly 1 odd number is $\qquad$, and the number of groups with no odd numbers is $\qquad$.
answer: 14,25