package oop_191Final;


import java.io.BufferedReader;
import java.io.FileReader;
import oop_191Final.C.D;


public class Question2 {
    public static void main(String[] args) throws Exception{
        BufferedReader br =new BufferedReader (new FileReader("D:\\OOP1\\src\\oop_191Final\\numbers.txt"));

        String s=br.readLine();

        while(s!=null)
        {
            String[] string=s.split(",");/// 40,60,70

            int[] a=new int[string.length];

            for(int i=0;i<a.length;i++)
            {
              a[i]=Integer.parseInt(string[i]);
            }
            int max=0;
            for(int i=0;i<a.length;i++)
            {
                if(max<a[i])
                {
                    max=a[i];
                }
            }
            System.out.println(max);
            s=br.readLine();
        }



    }
}