#include <iostream>
using namespace std;
int main(){
	for(int i=1;i*10<100;i++){
		if((100-10*i)%20==0) cout<<i<<" "<<(100-i*10)/20<<endl; 
	}
}
/**************************************************************
	Problem: 1792
	User: panyuchen
	Language: C++
	Result: Accepted
	Time:4 ms
	Memory:2072 kb
****************************************************************/