#include<bits/stdc++.h>
using namespace std;
int main()
{
	int n,h,c,s,g;
	cin>>h>>c;
	for(n=10;n<=99;n++){
		s=n/10;
		g=n%10;
		if(s>g){
			if(s-g==c&&s+g==h){
				cout<<n<<" ";
				break;
			}
		}
		else if(g-s==c&&s+g==h){
			cout<<n<<" ";
			break;
		}
	}
	return 0;
}