output_description: Print the formula you made, including the part `=7`.
  
  Use the signs `+` and `-`.
  
  Do not print a space between a digit and a sign.
  
  * * *
input_description: Input is given from Standard Input in the following format:
  
      
      
      ABCD
attempt: s = list(input())
  a = int(s[0])
  b = int(s[1])
  c = int(s[2])
  d = int(s[3])
  number = [a, b, c, d]
  
  plusminus = ["+", "-"]
  
  
  def plusminus(number, i, j, k):
      a = number[0]
      b = number[1]
      c = number[2]
      d = number[3]
      if i == 0:
          if j == 0:
              if k == 0:
                  if a + b + c + d == 7:
                      print(str(a) + "+" + str(b) + "+" + str(c) + "+" + str(d) + "=7")
                      return True
                  else:
                      return False
              else:
                  if a + b + c - d == 7:
                      print(str(a) + "+" + str(b) + "+" + str(c) + "-" + str(d) + "=7")
                      return True
                  else:
                      return False
          else:
              if k == 0:
                  if a + b - c + d == 7:
                      print(str(a) + "+" + str(b) + "-" + str(c) + "+" + str(d) + "=7")
                      return True
                  else:
                      return False
              else:
                  if a + b - c - d == 7:
                      print(str(a) + "+" + str(b) + "-" + str(c) + "-" + str(d) + "=7")
                      return True
                  else:
                      return False
      else:
          if j == 0:
              if k == 0:
                  if a - b + c + d == 7:
                      print(str(a) + "-" + str(b) + "+" + str(c) + "+" + str(d) + "=7")
                      return True
                  else:
                      return False
              else:
                  if a - b + c - d == 7:
                      print(str(a) + "-" + str(b) + "+" + str(c) + "-" + str(d) + "=7")
                      return True
                  else:
                      return False
          else:
              if k == 0:
                  if a - b - c + d == 7:
                      print(str(a) + "-" + str(b) + "-" + str(c) + "+" + str(d) + "=7")
                      return True
                  else:
                      return False
              else:
                  if a - b - c - d == 7:
                      print(str(a) + "-" + str(b) + "-" + str(c) + "-" + str(d) + "=7")
                      return True
                  else:
                      return False
  
  
  for i in range(2):
      for j in range(2):
          for k in range(2):
              if plusminus(number, i, j, k):
                  break
          break
  
      break
  
problem_description: 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.
samples: [{"input": "1222", "output": "1+2+2+2=7\n    \n\nThis is the only valid solution.\n\n* * *"}, {"input": "0290", "output": "0-2+9+0=7\n    \n\n0 - 2 + 9 - 0 = 7 is also a valid solution.\n\n* * *"}, {"input": "3242", "output": "3+2+4-2=7"}]