#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,m;
	cin>>n>>m;
	if((n-m)/2==0){//考虑首位为0的情况 
		cout<<(n+m)/2<<(n-m)/2<<endl;
	}
	else{
		cout<<(n-m)/2<<(n+m)/2<<endl;
	}
	return 0;
}