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 C++14 (GCC 5.4.1) (judge verdict: Accepted)

//in the name of god
//if you read this code please search about imam hussain
#include<bits/stdc++.h>

using namespace std;

typedef long long ll;

#define pb push_back;
#define endl "\n";
#define X first;
#define Y second;
#define pii pair<int,int>;
#define migmig ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define read freopen("input.txt", "r", stdin);freopen("output.txt", "w", stdout);

const int maxn=1e5+5;
const int mod=1e9+7;
const int inf=1e9;
const int del=728729;

ll poww(ll a, ll b, ll md) {
    return (!b ? 1 : (b & 1 ? a * poww(a * a % md, b / 2, md) % md : poww(a * a % md, b / 2, md) % md));
}
ll dp[maxn];
int main(){
	migmig;
	int a,b,c,d;
	string s;
	cin >> s;
	a=s[0]-'0';
	b=s[1]-'0';
	c=s[2]-'0';
	d=s[3]-'0';
	if(a+b+c+d==7){
		cout<<a<<"+"<<b<<"+"<<c<<"+"<<d;	cout<<"=7";
		return 0;
	}
	if(a+b+c-d==7){
		cout<<a<<"+"<<b<<"+"<<c<<"-"<<d;	cout<<"=7";
		return 0;
	}
	if(a+b-c+d==7){
		cout<<a<<"+"<<b<<"-"<<c<<"+"<<d;	cout<<"=7";
		return 0;
	}
	if(a-b+c+d==7){
		cout<<a<<"-"<<b<<"+"<<c<<"+"<<d;	cout<<"=7";
		return 0;
	}
	if(a-b-c+d==7){
		cout<<a<<"-"<<b<<"-"<<c<<"+"<<d;	cout<<"=7";
		return 0;
	}
	if(a-b+c-d==7){
		cout<<a<<"-"<<b<<"+"<<c<<"-"<<d;	cout<<"=7";
		return 0;
	}
	if(a+b-c-d==7){
		cout<<a<<"+"<<b<<"-"<<c<<"-"<<d;
			cout<<"=7";
		return 0;
	}if(a-b-c-d==7){
		cout<<a<<"-"<<b<<"-"<<c<<"-"<<d;
		cout<<"=7";
		return 0;
	}

	return 0;
}