import java.util.*;
import java.io.*;
public class C
{
	public static void main(String[] args) throws Throwable
	{
		Scanner read = new Scanner(new File("src/textA.txt"));

		String word[] = new String[1000];
		int leng[] = new int[1000];
		int n = 0;
		int m = 0;

		while(read.hasNext())
		{
			word[n] = read.next();

			for(int i=0;i<word[n].length();i++)
			{
				if((int)word[n].charAt(i)==45)
					m++;

				for(int j=97;j<123;j++)
					if((int)word[n].charAt(i)==j)
						m++;

				for(int j=65;j<91;j++)
					if((int)word[n].charAt(i)==j)
						m++;
			}

			leng[n] = m;

			if(word[n].equals("E-N-D"))
				break;

			n++;
			m = 0;
		}

		int maxL=leng[0],maxN = 0;
		for(int i = 1;i<n;i++)
		{
			if(leng[i]>maxL)
			{
				maxL=leng[i];
				maxN=i;
			}
		}
		System.out.println(word[maxN].toLowerCase());
	}
}