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package com.codegym.task.task18.task1803;
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.InputStreamReader;
import java.util.HashMap;
import java.util.Map;
/*
Most frequent bytes
*/
public class Solution {
public static void main(String[] args) throws Exception {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
String fileName = reader.readLine();
FileInputStream inputStream = new FileInputStream(fileName);
Map<Integer, Integer> map = new HashMap<>();
int data;
Integer max = 0;
while (inputStream.available() > 0) {
data = inputStream.read();
int counterForData = 0;
if (map.containsKey(data))counterForData = map.get(data);
map.put(data, counterForData + 1);
if (map.get(data) > max) max = map.get(data);
}
inputStream.close();
for (Map.Entry<Integer, Integer> entry : map.entrySet()){
if(entry.getValue() >= max) {
System.out.print(entry.getKey() + "/t");
}
}
}
}