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.Scanner;


public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner sc = new Scanner(System.in);
		char[] c = sc.next().toCharArray();
		for(int i=0; i<(1<<3); i++){
			StringBuffer str = new StringBuffer();
			str.append(c[0]);
			int cal = Character.getNumericValue(c[0]);
			for(int j=0; j<3;j++){
				if ((1 & i>>j) == 1){
					str.append("+");
					cal += Character.getNumericValue(c[j+1]);
				}else{
					str.append("-");
					cal -= Character.getNumericValue(c[j+1]);
				}
				str.append(c[j+1]);
			}
			if(cal == 7){
				System.out.println(str.toString() + "=7");
				break;
			}
		}

		sc.close();
	}


}