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 PyPy3 (7.3.0) (judge verdict: Accepted)

s = input()
a=int(s[0])
b=int(s[1])
c=int(s[2])
d=int(s[3])
for j in range(2):
    for k in range(2):
        for l in range(2):
            sm=a
            if j==0:
                B='+'
                sm+=b
            else:
                B='-'
                sm-=b
            if k==0:
                C='+'
                sm+=c
            else:
                C='-'
                sm-=c
            if l==0:
                D='+'
                sm+=d
            else:
                D='-'
                sm-=d
            if sm==7:
                
                m=str(a)+B+str(b)+C+str(c)+D+str(d)+'=7'
                print(m)
                exit()