#include<cstdio>

int Sum(int n)

{

    int sum=0;

    while(n!=0)

    {

        sum+=n%10;

        n/=10;

    }

    return sum;

}

void Cal(int a,int b)

{

    while(a!=b)

    {

        if(a<b)

        {

            a+=Sum(a);

        }

        else

        {

            b+=Sum(b);

        }

    }

    printf("%d\n",a);

}

int main()

{

    int n;

    int count=1;

    while(~scanf("%d",&n)&&n)

    {    if(count>1)

        printf("\n");

        printf("Case #%d\n",count++);

        int nn=Sum(n);

        if(nn%9==0)

        {

            printf("first meets river 9 at ");

            Cal(9,n);

        }

       else  if(nn%3==0)

        {

             printf("first meets river 3 at ");

            Cal(3,n);

        }

        else

        {

             printf("first meets river 1 at ");

            Cal(1,n);

        }

    }

}