?
package com.javarush.task.task19.task1908;
import java.io.*;
/*
Выделяем числа
*/
public class Solution {
public static void main(String[] args) throws Exception {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
String filename1 = reader.readLine();
String filename2 = reader.readLine();
reader.close();
BufferedReader fileReader = new BufferedReader(new FileReader(filename1));
BufferedWriter fileWriter = new BufferedWriter(new FileWriter(filename2,true));
while(fileReader.ready())
{
String [] digits = fileReader.readLine().replaceAll("^\\d", " ").split(" ");
for(String digit : digits)
{fileWriter.write(digit+" ");}
}
fileReader.close();
fileWriter.close();
}
}