24

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
//[95632;95650]

public class aas {
    public static void main(String[] args) {
           try{
               FileReader fr = new FileReader("C:/Users/alexa/Downloads/24.txt");
               BufferedReader bf = new BufferedReader(fr);
               String[] s = new String[1000];
               for(int i =0;i<s.length;i++){
                   s[i]= bf.readLine();
               }
               int nnow=0,nmin=10000,nminindex=0;
               String[] str;
               for(int i =0;i<s.length;i++){
                   nnow=0;
                   str=s[i].split("");
                   for(int j = 0;j<str.length;j++){
                       if(str[j].equals("N")){
                           nnow+=1;
                       }
                   }
                   if(nnow<nmin){
                       nmin=nnow;
                       nminindex=i;
                   }
               }
                str=s[nminindex].split("");
               String[] alf = {"A",
                       "B",
                       "C",
                       "D",
                       "E",
                       "F",
                       "G",
                       "H",
                       "I",
                       "J",
                       "K",
                       "L",
                       "M",
                       "N",
                       "O",
                       "P",
                       "Q",
                       "R",
                       "S",
                       "T",
                       "U",
                       "V",
                       "W",
                       "X",
                       "Y"};
               String mincymb="";
               nmin=1000;
               for(int i=0;i<alf.length;i++){
                   nnow=0;
                   for(int j=0;j< str.length;j++){
                       if(str[j].equals(alf[i])){
                           nnow+=1;
                       }
                       if (nnow<nmin);{
                           mincymb=alf[i];
                           nmin=nnow;
                       }
                   }
               }
               System.out.println(mincymb);
           }
           catch(IOException e ){}
        }
    }