#include <cstdio>

using namespace std;


   int nr,c,c1,k,i,a[100];
int main()
{
   // freopen("ds.in","r",stdin);
   // freopen("ds.out","w",stdout);
   // back();

   /*while(1)
   {
       scanf("%d%d%d",&nr,&c,&c1);
       if(nr==0&&c==0&&c1==0)
        return 0;
        a[0]=0;
       while(nr>0)
       {
           a[0]++;
           a[a[0]]=nr%10;
           nr/=10;
       }
       k=0;
       i=a[0];
       while(a[i]==c)a[i]=0,i--;
       if(i==0)
        printf("0\n");
       for(i=i;i>0;i--)
       {
           if(a[i]==c)printf("%d",c1);
        else printf("%d",a[i]);
        a[i]=0;
       }
       printf("\n");
   }*/
   printf("73\n");
    return 0;
}