Alphabet Spam Solution:

import java.util.*;

public class Kattis {
    public static void main(String[] args) {
        String line = new Scanner(System.in).nextLine();
        double whitespace = 0;
        double lowercase = 0;
        double uppercase = 0;
        double symbols = 0;
        for(int i = 0; i < line.length(); i++){
            char curr = line.charAt(i);
            if(curr == '_')
                whitespace++;
            else if(curr >= 'A' && curr <= 'Z')
                uppercase++;
            else if (curr >= 'a' && curr <= 'z')
                lowercase++;
            else
                symbols++;
        }
        System.out.println(whitespace/line.length()+System.lineSeparator()+lowercase/line.length()+System.lineSeparator()+uppercase/line.length()+System.lineSeparator()+symbols/line.length());
    }
}