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 Lua (5.3.2) (judge verdict: Runtime Error)

A=io.read("n")
B=io.read("n")
C=io.read("n")
D=io.read("n")
if A+B+C+D==7 then 
  print(string.format("%d+%d+%d+%d=7",A,B,C,D))
elseif A+B+C-D==7 then
  print(string.format("%d+%d+%d-%d=7",A,B,C,D))
  elseif A+B-C+D==7 then
    print(string.format("%d+%d-%d+%d=7",A,B,C,D))
    elseif A+B-C-D==7 then
      print(string.format("%d+%d-%d-%d=7",A,B,C,D))
      elseif A-B+C+D==7 then
        print(string.format("%d-%d+%d+%d=7",A,B,C,D))
        elseif A-B+C-D==7 then
          print(string.format("%d-%d+%d-%d=7",A,B,C,D))
          elseif A-B-C+D==7 then
             print(string.format("%d-%d-%d+%d=7",A,B,C,D))
             elseif A-B-C-D==7 then
               print(string.format("%d-%d-%d-%d=7",A,B,C,D))
end