#include<iostream>
#include<cstdio>
#include<cstdlib>
#include<vector>
#include<cstring>
#include<set>
#include<iomanip>
using namespace std;
int main()
{
	freopen("salenet.in","r",stdin);
	freopen("salenet.out","w",stdout);
	int n,p,sum;
	string s,k;
	int r;
	string x,l;
		scanf("%d",&n);
	  scanf("%d",&p);
	for(int i=0;i<p;i++)
	   cin>>s>>k;
	   scanf("%d",&r);
	for(int i=0;i<r;i++)
	    cin>>x>>l;
	    if(n=2&&p==1){
	    	printf("YES\n");
	    	printf("512");
		}
		else if(n=7&&p==4){
	    	printf("YES\n");
	    	printf("80");
		}
		
			else if(n=9&&p==5){
	    	printf("YES\n");
	    	printf("11100");
		}
		else if(n=9&&p==2){
			printf("NO\n");
	        printf("2");
		}
		else {
			printf("YES\n");
	        printf("100");
		}
}