Problem:
Score : 300 points

Problem Statement

Sitting in a station waiting room, Joisino is gazing at her train ticket.

The ticket is numbered with four digits A, B, C and D in this order, each between 0 and 9 (inclusive).

In the formula A op1 B op2 C op3 D = 7, replace each of the symbols op1, op2 and op3 with + or - so that the formula holds.

The given input guarantees that there is a solution. If there are multiple solutions, any of them will be accepted.

Constraints

0≤A,B,C,D≤9

All input values are integers.

It is guaranteed that there is a solution.

Input

Input is given from Standard Input in the following format:

ABCD

Output

Print the formula you made, including the part =7.

Use the signs + and -.

Do not print a space between a digit and a sign.

Sample Input 1

1222

Sample Output 1

1+2+2+2=7

This is the only valid solution.

Sample Input 2

0290

Sample Output 2

0-2+9+0=7

0 - 2 + 9 - 0 = 7 is also a valid solution.

Sample Input 3

3242

Sample Output 3

3+2+4-2=7

Solution in Java8 (OpenJDK 1.8.0) (judge verdict: Wrong Answer)



        import java.util.*;
        import java.io.*;

class Main
{
    static class FastReader {
        BufferedReader br;
        StringTokenizer st;

        public FastReader() {
            br = new BufferedReader(new
                    InputStreamReader(System.in));
        }

        String next() {
            while (st == null || !st.hasMoreElements()) {
                try {
                    st = new StringTokenizer(br.readLine());
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        }

        int nextInt() {
            return Integer.parseInt(next());
        }

        long nextLong() {
            return Long.parseLong(next());
        }

        double nextDouble() {
            return Double.parseDouble(next());
        }

        String nextLine() {
            String str = "";
            try {
                str = br.readLine();
            } catch (IOException e) {
                e.printStackTrace();
            }
            return str;
        }
    }

    public static void main(String[] args)
    {
        FastReader s = new FastReader();
        String line = s.nextLine();
        int a = Integer.parseInt(line.charAt(0)+"");
        int b = Integer.parseInt(line.charAt(1)+"");
        int c = Integer.parseInt(line.charAt(2)+"");
        int d = Integer.parseInt(line.charAt(3)+"");

        if(a+b+c+d == 7)
        {
            System.out.println(a+"+"+b+"+"+c+"+"+d+"=7");
        }
        else if(a-b+c+d == 7)
        {
            System.out.println(a+"-"+b+"+"+c+"+"+d+"=7");
        }
        else if (a+b-c+d == 7)
        {
            System.out.println(a+"+"+b+"-"+c+"+"+d+"=7");
        }
        else if (a-b-c+d == 7)
        {
            System.out.println(a+"-"+b+"-"+c+"-"+d+"=7");
        }
        else if (a+b+c-d == 7 )
        {
            System.out.println(a+"+"+b+"+"+c+"-"+d+"=7");
        }
        else if (a-b+c-d == 7)
        {
            System.out.println(a+"-"+b+"+"+c+"-"+d+"=7");
        }
        else if (a+b-c-d == 7)
        {
            System.out.println(a+"+"+b+"-"+c+"-"+d+"=7");
        }
        else
        {
            System.out.println(a+"-"+b+"-"+c+"-"+d+"=7");
        }


    }
}