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)

// C - Train Ticket
// https://atcoder.jp/contests/abc079/tasks/abc079_c
#include <bits/stdc++.h>
#define lli long long int
#define uli unsigned long long int
#define rep(i, m, n) for (lli i = m; i < (n); i++)
#define repe(i, m, n) for (lli i = m; i <= (n); i++)
#define ALL(x) (x).begin(), (x).end()
#define SIZE(x) ((lli)(x).size())
#define MAX(x) *max_element(ALL(x))
#define INF 1000000000000 //10^12
#define MOD 10000007      //10^9+7
#define SORT(n) sort(n.begin(), n.end())
#define SORTR(n) sort(n.begin(), n.end(), greater<int>())
#define REV(n) reverse(n.begin(), n.end())
#define Vec(K, L, N, S) vector<L> K(N, S)
#define rt sqrt
using namespace std;
using vi = vector<int>;
using vvi = vector<vi>;
using vvvi = vector<vvi>;
using vlli = vector<lli>;
using vs = vector<string>;
using ll = long long;
// vector入力
template <typename T>
istream &operator>>(istream &is, vector<T> &vec)
{
  for (T &x : vec)
    is >> x;
  return is;
}
// vector出力
template <typename T>
ostream &operator<<(ostream &os, vector<T> &vec)
{
  // os << '{';
  for (int i = 0; i < vec.size(); i++)
  {
    os << vec[i] << (i + 1 == vec.size() ? "" : "");
  }
  // os << '}';
  return os;
}

int main()
{
  ios::sync_with_stdio(false);
  cin.tie(0);
  lli a, b, c, d, n, w, ans = 0, count = 0;
  string s, t;
  cin >> s;
  a = (int)(s[0]) - 48;
  b = (int)(s[1]) - 48;
  c = (int)(s[2]) - 48;
  d = (int)(s[3]) - 48;
  vlli e = {a, b, c, d};
  SORTR(e);
  if (a + b + c + d == 7)
  {
    cout << a << '+' << b << '+' << c << '+' << d << "=7" << endl;
  }
  else if (a + b + c - d == 7)
  {
    cout << a << '+' << b << '+' << c << '-' << d << "=7" << endl;
  }
  else if (a + b - c - d == 7)
  {
    cout << a << '+' << b << '-' << c << '-' << d << "=7" << endl;
  }
  else if (a + b - c + d == 7)
  {
    cout << a << '+' << b << '-' << c << '+' << d << "=7" << endl;
  }
  else if (a - b + c - d == 7)
  {
    cout << a << '-' << b << '+' << c << '-' << d << "=7" << endl;
  }
  else if (a - b + c + d == 7)
  {
    cout << a << '-' << b << '+' << c << '+' << d << "=7" << endl;
  }
  else if (a - b - c - d == 7)
  {
    cout << a << '-' << b << '-' << c << '-' << d << "=7" << endl;
  }
  else
  {
    cout << a << '-' << b << '-' << c << '+' << d << "=7" << endl;
  }
}