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.ArrayList;
import java.util.Scanner;

public class Main {

	public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		String a = sc.next();
		ArrayList<Integer> array = new ArrayList<Integer>();
		for(int i = 0;i<4;i++){
			array.add(Integer.parseInt(a.substring(i,i+1)));
		}
		String[] param = a.split("");
		if(array.get(0) + array.get(1) + array.get(2) + array.get(3) == 7){
			System.out.println(array.get(0) + "+" + array.get(1) + "+" + array.get(2) + "+" + array.get(3) +"=7" );
		}else if(array.get(0) + array.get(1) + array.get(2) - array.get(3) == 7){
			System.out.println(array.get(0) + "+" + array.get(1) + "+" + array.get(2) + "-" + array.get(3) +"=7" );
		}else if(array.get(0) + array.get(1) - array.get(2) - array.get(3) == 7){
			System.out.println(array.get(0) + "-" + array.get(1) + "+" + array.get(2) + "-" + array.get(3) +"=7" );
		}else if(array.get(0) + array.get(1) - array.get(2) + array.get(3) == 7){
			System.out.println(array.get(0) + "+" + array.get(1) + "-" + array.get(2) + "+" + array.get(3) +"=7" );
		}else if(array.get(0) + array.get(1) - array.get(2) - array.get(3) == 7){
			System.out.println(array.get(0) + "+" + array.get(1) + "-" + array.get(2) + "-" + array.get(3) +"=7" );
		}else if(array.get(0) - array.get(1) + array.get(2) + array.get(3) == 7){
			System.out.println(array.get(0) + "-" + array.get(1) + "+" + array.get(2) + "+" + array.get(3) +"=7" );
		}else if(array.get(0) - array.get(1) - array.get(2) + array.get(3) == 7){
			System.out.println(array.get(0) + "-" + array.get(1) + "-" + array.get(2) + "+" + array.get(3) +"=7" );
		}else if(array.get(0) - array.get(1) - array.get(2) - array.get(3) == 7){
			System.out.println(array.get(0) + "-" + array.get(1) + "-" + array.get(2) + "-" + array.get(3) +"=7" );
		}else if(array.get(0) - array.get(1) + array.get(2) - array.get(3) == 7){
			System.out.println(array.get(0) + "-" + array.get(1) + "+" + array.get(2) + "-" + array.get(3) +"=7" );
		}
	}
}