input: Write a python function to define a class for 3-dimensional vectors with methods to add, subtract, and print vectors.
  assert Vector(1, 2, 3).addVec(Vector(5, 3, 2)).printVec() == None  # Expected: (6, 5, 5)
  assert Vector(1, 2, 3).subVec(Vector(5, 3, 2)).printVec() == None  # Expected: (-4, -1, 1)
output: class Vector:
      def __init__(self, x, y, z):
          self.x = x
          self.y = y
          self.z = z
  
      def addVec(self, other):
          return Vector(self.x + other.x, self.y + other.y, self.z + other.z)
  
      def subVec(self, other):
          return Vector(self.x - other.x, self.y - other.y, self.z - other.z)
  
      def printVec(self):
          print(f"({self.x}, {self.y}, {self.z})")