J=lambda:list(map(int,input().split()))
V={}
E={}
F={}
for _ in range(sum(J())):A,B,C=J();V[A]=V[B]=V[C]=E[(A,B)]=E[(B,C)]=E[(A,C)]=F[(A,B,C)]=1
print(len(V)-len(E)+len(F))