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 Python (3.8.2) (judge verdict: Accepted)

# n, m, l = map(int, input().split())

# list_n = list(map(int, input().split()))

# n = input()
# list = [input() for i in range(N)

# list = [[i for i in range(N)] for _ in range(M)]

import sys
input = sys.stdin.readline


def cal(Sn, opt):
    ans = Sn[0]
    for i in range(3):
        if opt[i] == '+':
            ans += Sn[i+1]
        else:
            ans -= Sn[i+1]
    return ans


S = list(input().rstrip('\n'))
Sn = [int(i) for i in S]
op = ['+', '-']
opL = [(i, j, k) for i in op for j in op for k in op]

for opt in opL:
    if cal(Sn, opt) == 7:
        break

ans = ''
for i in range(3):
    ans += S[i] + opt[i]
ans += S[3] + '=7'
print(ans)