题意/题解：大水题，不想说了。

View Code 
 1 #include<cstdio>
 2 #include<cstring>
 3 using namespace std;
 4 int main()
 5 {
 6     int ca=0,n;
 7     while(scanf("%d",&n),n)
 8         printf("%d. %s %d\n",++ca,(n%2==0)?"even":"odd",(3*n+1)/2/3);
 9     return 0;
10 }