# include<stdio.h>
# include<algorithm>
# include<string.h>
using namespace std;
int vis[25];
int num[25];
int n,cot;
int prime(int sum)
{
    int i;
    if(sum==2)
        return false;
    for(i=2;i*i<=sum;i++)
    {
        if(sum%i==0)
            break;
    }
    if(i*i>sum)
        return true;
    return false;
}
void dfs()
{
    int i;
    for(i=1;i<=n&&cot<=n;i++)
    {
        if(!vis[i]&&prime(num[cot-1]+i))
        {
            vis[i]=1;
            num[cot++]=i;
            dfs();	
			vis[num[cot-1]]=0;
			cot--;
        }
    }
    if(cot==n+1&&prime(num[1]+num[cot-1]))
    {
        for(i=1;i<=n;i++)
        {
            if(i==1)
                printf("%d",num[i]);
            else
                printf(" %d",num[i]);
        }
        printf("\n");
    }
}
int main ()
{
    int cas=0;
    while(~scanf("%d",&n))
    {
        printf("Case %d:\n",++cas);
        memset(vis,0,sizeof(vis));
        memset(num,0,sizeof(num));
        cot=2;
        vis[1]=1;
        num[1]=1;
        dfs();
        printf("\n");
    }
    return 0;
}

hdu 1016(经典搜素)