#include<bits/stdc++.h>
using namespace std;
int snt(int n){
	if(n<2) return 0;
	for(int i=2;i*i<=n;i++){
		if(n%i==0) return 0;
	}
	return 1;
}
int main(){
	int k,x;
	cin>>k>>x;
	bool a=true;
	int dem=0;
	int luu=k;
	if(!snt(k)) a=false; 
	while(k!=0){
		dem++;
		k/=10;
	}
	if(dem!=x) a=false;
	int tong=0;
	while(luu!=0){
		tong+=(luu%10);
		if(!snt(luu%10)) a=false;
		luu/=10;
	}
	if(!snt(tong)) a=false;
	if(a) cout<<"YES";
	else cout<<"NO";
}

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