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: Accepted)

import java.util.*;
public class Main{
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		long []A = new long[4];
		String S = sc.next();
		String ans;
		for(int i = 0; i<4;i++){
			A[i]=S.charAt(i)-'0';
		}
		
		
		for(int i = 0;i<(1<<3); i++){
			ans = "" + S.charAt(0);
			long sum = A[0];
			for(int j = 0;j<3;j++){
				if((1&i>>j)==1){
					sum += A[j+1];
					ans += "+" +S.charAt(j+1);
				}else{
					sum -= A[j+1];
					ans += "-" +S.charAt(j+1);
				}
				
			
			}
			if(sum == 7){
				System.out.println(ans + "=7");
				break;
			}
		}
	
	
	}


}