#include <bits/stdc++.h>
using namespace std;

int main(){
	for(int i = 1;i <= (100 - 20) / 10;i++){
		int x = 100 - i * 10;
		if(x % 20 == 0){
			cout<<i<<" "<<x / 20<<endl;
		}
	}
}


/**************************************************************
	Problem: 1792
	User: admin
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/