#include<bits/stdc++.h>
using namespace std;
bool k(int m){
	if(m<=1) return false;
	if(m==2) return true;
	for(int i=2;i<=sqrt(m);i++){
		if(m%i==0) return false;
	}
	return true;
}
int main(){
	for(char i='A';i<='Z';i++){
		if(k(i)) cout<<int(i)<<" "<<char(i)<<endl;
	}
	for(char i='a';i<='z';i++){
		if(k(i)) cout<<int(i)<<" "<<char(i)<<endl;
	}
}

/**************************************************************
	Problem: 1972
	User: wangyiyang
	Language: C++
	Result: Accepted
	Time:4 ms
	Memory:2072 kb
****************************************************************/