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 (3.4.3) (judge verdict: Accepted)


s = input()

ints = [int(s[i]) for i in range(len(s))]

rope = []
o = []
o.append(str(ints[0]))

for i  in range(2**(len(ints)-1)):
	total = ints[0]
	ope = ['-' for i in range(len(ints)-1)]

	for j in range(len(ints)-1):

		if((i>>j) & 1):
			total = total + ints[j+1]
			ope[j] = '+'
		else :
			total = total - ints[j+1]
			ope[j] = '-'

	# print('t',total)
	if total == 7:
		rope = ope
		break


for i in range(len(rope)):
	o.append(rope[i])
	o.append(str(ints[i+1]))


print(''.join(o)+'=7')