.
package com.javarush.task.task18.task1803;
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
/*
Самые частые байты
*/
public class Solution {
public static void main(String[] args) throws Exception {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
FileInputStream inputStream = new FileInputStream(reader.readLine());
HashMap<Integer, Integer> map = new HashMap<>();
int[] array = new int[inputStream.available()+1];
int i = 0;
int max = Integer.MIN_VALUE;
while (inputStream.available() > 0){
array[i] = inputStream.read();
i++;
}
for (int j = 0; j < array.length; j++) {
int k = 1;
if (!map.containsKey(array[j])){
map.put(array[j], k);
} else if (map.containsKey(array[j])) {
Integer integer1 = array[j];
Integer i1 = map.get(integer1);
Integer integer = i1 + 1;
map.put(integer1, integer);
}
}
for (Map.Entry<Integer, Integer> entry : map.entrySet()){
if (entry.getValue() > max){
max = entry.getValue();
}
}
for (Map.Entry<Integer, Integer> entry : map.entrySet()){
if (entry.getValue() == max){
max = entry.getKey();
}
}
System.out.println(max);
inputStream.close();
}
}