include<stdio.h>

using namespace std; int i; int main() {

int a[15]={0,1,2,3,4,5,6,7,8,9,10,11,12,13,14};
int b;
scanf("%d",&b);
if(b<=14){
	printf("%d",b);
}
if(b>14){
	printf("no");
}
return 0;

}