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 5.4.1) (judge verdict: Accepted)

/*2019/09/13 */
#include<stdio.h>
#include<stdlib.h>
#include<math.h>
#include<string.h>
#define MOD 1000000007
#define MIN 999999999
#define MAX -999999999
typedef long long int ll;
typedef unsigned long long int ull;
void llswap(ll *x,ll *y){ll tmp;tmp=*x;*x=*y;*y=tmp;}
void swap(int *x,int *y){int tmp;tmp=*x;*x=*y;*y=tmp;}
int rmax(int x,int y){return x>y?x:y;}
int rmin(int x,int y){return x>y?y:x;}
ll llrmax(ll x,ll y){return x>y?x:y;}
ll llrmin(ll x,ll y){return x>y?y:x;}
int asc(const void *a,const void *b){return *(int*)a-*(int*)b;}
int desc(const void *a,const void *b){return *(int*)b-*(int*)a;}
int llasc(const void *a,const void *b){return *(ll*)a-*(ll*)b;}
int lldesc(const void *a,const void *b){return *(ll*)b-*(ll*)a;}
int gcd(int x,int y){if(y==0)return x;return gcd(y,x%y);}
/*
int asc_t(const void *a,const void *b){return ((struct_t*)a)->member - ((struct_t*)b)->member;}
int desc_t(const void *a,const void *b){return ((struct_t*)b)->member - ((struct_t*)a)->member;}
*/

int main(){
    int a,b,c,d,ans;
    char str[10];
    scanf("%s",str);
    a=str[0]-0x30;
    b=str[1]-0x30;
    c=str[2]-0x30;
    d=str[3]-0x30;
    ans=a+b+c+d;
    if(ans==7){
        printf("%d+%d+%d+%d=7\n",a,b,c,d);
        return 0;
    }
    ans=a+b+c-d;
    if(ans==7){
        printf("%d+%d+%d-%d=7\n",a,b,c,d);
        return 0;
    }
    ans=a+b-c+d;
    if(ans==7){
        printf("%d+%d-%d+%d=7\n",a,b,c,d);
        return 0;
    }
    ans=a+b-c-d;
    if(ans==7){
        printf("%d+%d-%d-%d=7\n",a,b,c,d);
        return 0;
    }
    ans=a-b+c+d;
    if(ans==7){
        printf("%d-%d+%d+%d=7\n",a,b,c,d);
        return 0;
    }
    ans=a-b+c-d;
    if(ans==7){
        printf("%d-%d+%d-%d=7\n",a,b,c,d);
        return 0;
    }
    ans=a-b-c+d;
    if(ans==7){
        printf("%d-%d-%d+%d=7\n",a,b,c,d);
        return 0;
    }
    ans=a-b-c-d;
    if(ans==7){
        printf("%d-%d-%d-%d=7\n",a,b,c,d);
        return 0;
    }
}