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 (GCC 9.2.1) (judge verdict: Wrong Answer)

#include<stdio.h>
int main(void)
{
    char S[5];
    int A,B,C,D;
  
    scanf("%s",S);
  
    A=S[0]-'0';
    B=S[1]-'0';
    C=S[2]-'0';
    D=S[3]-'0';
  
    if(A+B+C+D==7) printf("%d+%d+%d+%d=7\n",A,B,C,D);
    else if(A+B+C-D==7) printf("%d+%d+%d-%d=7\n",A,B,C,D);
    else if(A+B-C-D==7) printf("%d+%d-%d-%d=7\n",A,B,C,D);
    else if(B+C+D-A==7) printf("%d+%d+%d-%d=7\n",B,C,D,A);
    else if(B+C-D-A==7) printf("%d+%d-%d-%d=7\n",B,C,D,A);
    else if(C+D+A-B==7) printf("%d+%d+%d-%d=7\n",C,D,A,B);
    else if(C+D-A-B==7) printf("%d+%d-%d-%d=7\n",C,D,A,B);
    else if(D+A+B-C==7) printf("%d+%d+%d-%d=7\n",D,A,B,C);
    else if(D+A-B-C==7) printf("%d+%d-%d-%d=7\n",D,A,B,C);
  
    return 0;
}