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 Fortran (gfortran v4.8.4) (judge verdict: Runtime Error)

integer N
integer A,B,C,D
read*,N
A=N/1000
N=N-A*1000
B=N/100
N=N-B*100
C=N/10
N=N-C*10
D=N
if(A+B+C+D==7)then
  print"(i0,A,i0,A,i0,A,i0)",A,"+",B,"+",C,"+",D,"=7"
  stop
end if
if(A+B+C-D==7)then
  print"(i0,A,i0,A,i0,A,i0,A)",A,"+",B,"+",C,"-",D,"=7"
  stop
end if
if(A+B-C+D==7)then
  print"(i0,A,i0,A,i0,A,i0,A)",A,"+",B,"-",C,"+",D,"=7"
  stop
end if
if(A+B-C-D==7)then
  print"(i0,A,i0,A,i0,A,i0,A)",A,"+",B,"-",C,"-",D,"=7"
  stop
end if
if(A-B+C+D==7)then
  print"(i0,A,i0,A,i0,A,i0,A)",A,"-",B,"+",C,"+",D,"=7"
  stop
end if
if(A-B+C-D==7)then
  print"(i0,A,i0,A,i0,A,i0,A)",A,"-",B,"+",C,"-",D,"=7"
  stop
end if
if(A-B-C+D==7)then
  print"(i0,A,i0,A,i0,A,i0,A)",A,"-",B,"-",C,"+",D,"=7"
  stop
end if
if(A-B-C-D==7)then
  print"(i0,A,i0,A,i0,A,i0,A)",A,"-",B,"-",C,"-",D,"=7"
  stop
end if
end