#include <bits/stdc++.h>
using namespace std;
int main()
{
	int i,j;
	
	for(i=65;i<=90;i++)
	{	bool t=1;
		for(j=2;j*j<=i;j++)
		{	
			if(i%j==0)
			{
				t=0;break;
			}
			
		}
		if(t==1)
		{
			cout<<i<<" "<<char(i)<<endl;
		} 
	}
	
	for(i=97;i<=122;i++)
	{	bool t=1;
		for(j=2;j*j<=i;j++)
		{
			if(i%j==0)
			{
				t=0;break;
			}
			
		}
		if(t==1)
		{
			cout<<i<<" "<<char(i)<<endl;
		} 
	}
	
	
	
	
	
	
	
	return 0;
}

/**************************************************************
	Problem: 1972
	User: 21A
	Language: C++
	Result: Accepted
	Time:10 ms
	Memory:2072 kb
****************************************************************/