What is wrong?
package pl.codegym.task.task08.task0823;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
/*
Ruszamy na cały kraj
*/
public class Solution {
public static void main(String[] args) throws IOException {
BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
String s = reader.readLine();
String[] slowa = s.split(" ");
String outS = "";
for(String slowo : slowa)
{
String first = slowo.substring(0,1);
first = first.toUpperCase();
outS += first + slowo.substring(1)+" ";
}
System.out.println(outS);
}
}