class Vector:
    def __init__(self, x, y):
        self.x = x
        self.y = y
        
    def add(self, other_vector):
        new_x = self.x + other_vector.x
        new_y = self.y + other_vector.y
        
        return Vector(new_x, new_y)
        
    
    def subtract(self, other_vector):
        new_x = self.x - other_vector.x
        new_y = self.y - other_vector.y
        
        return Vector(new_x, new_y)