def f(a,b):
if len(a) != len(b):
return False
if a == b:
return True
for i in range(1,len(a)):
if a[i:] + a[:i] == b:
return True
return False
n = int(input())
L = [input() for i in range(n)]
check = [True] * n
ans = 0
for i in range(n):
if check[i]:
ans+=1
for j in range(i+1,n):
if f(L[i],L[j]):
check[j] = False
print(ans)