[백준]11721_열 개씩 끊어 출력하기★

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
 
public class Main {
    public static void main(String args[]) throws IOException {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
 
        String str = br.readLine();
 
        for (int i = 0; i < str.length(); i++) {
            System.out.print(str.charAt(i));
            if (i % 10 == 9) {
                System.out.println();
            }
        }
    }
}