#include<bits/stdc++.h>
using namespace std;
int main()
{   
    int a,b;
    cin>>a>>b;
    for(int i=a;i<=a;i--){
    	if(a%i==0&&b%i==0){
    		cout<<"yue:"<<i;
    		break;
		}
	}
    
    return 0;
}

using namespace std;
int main()
{
int n,m,a=0;
cin>>n>>m;
for(int i=1;i<=n&&i<=m;i++){
if(n%i==0&&n%i==m%i&&i>a){
a=i;
}
}
cout<<"yue:"<<a;
return 0;
}

#include<bits/stdc++.h> using namespace std; int main(){ int a,b; cin>>a>>b; for(int i=a;i<=a;i--){ if(a%i0&&b%i0){ cout<<"yue:"<<i; break; } } return 0; }