import java.io.IOException;
import java.io.BufferedReader;
//~ import java.io.BufferedWriter;
import java.io.InputStreamReader;
//~ import java.io.PrintWriter;
//~ import java.util.Arrays;
//~ import java.util.Queue;
//~ import java.util.LinkedList;



public class guard {
    public static void main(String[] ars) throws IOException {
        BufferedReader r = new BufferedReader(new InputStreamReader(System.in));
        //~ BufferedWriter w = new BufferedWriter(new PrintWriter(System.out));
        String line;
        String[] parse;
        int a1, a2, a3, a4, a5;
        int b1, b2, b3, b4, b5;
        double d1, d2, d3, d4;
        double K = Math.sin(Math.PI / 3);
        double min;
        while (true) {
            line = r.readLine();
            parse = line.split(" ");
            a1 = Integer.parseInt(parse[0]);
            a2 = Integer.parseInt(parse[1]);
            a3 = Integer.parseInt(parse[2]);
            a4 = Integer.parseInt(parse[3]);
            a5 = Integer.parseInt(parse[4]);
            if (a1 == 0 && a2 == 0 && a3 == 0 && a4 == 0 && a5 == 0) break;
            line = r.readLine();
            parse = line.split(" ");
            b1 = Integer.parseInt(parse[0]);
            b2 = Integer.parseInt(parse[1]);
            b3 = Integer.parseInt(parse[2]);
            b4 = Integer.parseInt(parse[3]);
            b5 = Integer.parseInt(parse[4]);
            d1 = Math.abs(a1 - b1) * K;
            d2 = Math.abs(a2 - b2) * K;
            d3 = Math.abs(a3 - b3) * K;
            d4 = Math.abs(a4 - b4) * K;
            //~ System.out.println("xx " + d1);
            //~ System.out.println("xx " + d2);
            //~ System.out.println("xx " + d3);
            //~ System.out.println("xx " + d4);
            min = Math.min(d1, d2);
            min = Math.min(d3, min);
            min = Math.min(d4, min);
            System.out.format("%.3f%n", min);
        }
        //r.readLine();
        //w.write("a");
        //w.flush();
    }
}