import java.io.*;
class SimpleInput {
    static String readString() {
        BufferedReader input = 
          new BufferedReader(new InputStreamReader(System.in));
        try { return input.readLine(); }
        catch (IOException exception) {
	    System.out.println("Fehler in der Eingabe.");
	    return ""; 
	}
    }
    static double readDouble() {
        String doubleString = readString();
        try { return Double.parseDouble(doubleString); }
        catch (NumberFormatException exception) {
	    System.out.println("Keine Gleitkommazahl " +
			       "-- Rückgabewert 0.0");
	    return 0.0; 
	}
    }
    static int readInt() {
        String intString = readString();
        try { return Integer.parseInt(intString); }
        catch (NumberFormatException exception) {
	    System.out.println("Keine Zahl " +
			       "-- Rückgabewert 0");
	    return 0; 
	}
    }
    static boolean readBoolean() {
	String boolString = readString();
	if (boolString.equalsIgnoreCase("true")
	    || boolString.equalsIgnoreCase("yes")
	    || boolString.equalsIgnoreCase("y")
	    || boolString.equalsIgnoreCase("wahr")
	    || boolString.equalsIgnoreCase("ja")
	    || boolString.equalsIgnoreCase("j"))
	    return true;
	else
	    return false;
    }
}