#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: linmiaoling
	Language: C++
	Result: Accepted
	Time:4 ms
	Memory:2072 kb
****************************************************************/