#include <fstream>
#include <string>
#include <cstdio>
using namespace std;
ifstream cin("abbreviation.in");
ofstream cout("abbreviation.out");
int n,al;
string a,word="";
string ans;
string z(string x)
{
	for(int i=1;i<=al;i++)
	{
		if(x[i]>='a'&&x[i]<='z')
			x[i]=char(x[i]-'a'+'A');
		
	} 
	return x;
}
int getl(int i)
{
	int yi=i,k=0;
	word="";
	for(;i>=0&&a[i]!=' ';i--)
	{
		word+=a[i];
		k++;
	}
	if(k>3)
	{
		cout<<word[k-1];
		 return 0;
	}
	if(k>=3)
	if(word!="DNA"&&word!="ROF"&&word!="EHT")
		cout<<word[k-1];
	return 0; 
}
int main()
{
	int i,j;
	cin>>n;
	getline(cin,a);
	for(j=1;j<=n;j++)
	{
		getline(cin,a);
		//ans="";
		al=a.length()-1;
		i=0;
		a=z(a);
		//cout<<a;
		while(i<=al)
		{
			if(a[i]==' '||a[i]=='/n')
				getl(i-1);
			i++;
			
		}
		getl(al);
		cout<<endl;
	}
	cin.close();
	cout.close();
	return 0;
}