class Star:
    def __init__(self, x, y):
        self.x = x
        self.y = y

    def distance_sqr(self, other):
        return ((self.x - other.x) ** 2) + ((self.y - other.y) ** 2))

def return_key(A):
    return A[2] << 32 

def find_constellation(S):
    T = []
    for i in range(len(S)):
        for j in range(i + 1, len(S)):
            T.append( (S[i], S[j], S[i].distance_sqr(S[j])) )

    T.sort(key=return_key)

    cnt = 0
    for i in range(len(T)):