public static int[] xxx(String filename) throws IOException{
	int[] f = new int[26];
	BufferedReader in = new BufferedReader(new FileReader(filename));
	String line;
	while((line = in.readLine()) != null){
		line = line.toUpperCase();
		for(char ch:line.toCharArray()){
			if(Character.isLetter(ch)){
				f[ch - 'A']++;
			}
		}
	}
	in.close();
	return f;
}