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def count_equals(a, b, c):
s = {a, b, c}
if len(s) ==3:
return 0
if len(s) ==2:
return 2
if len(s) ==1:
return 3
assert count_equals(1,2,3) == 0
assert count_equals(1,1,3) == 2
assert count_equals(3,2,3) == 2
assert count_equals(2,2,3) == 2
assert count_equals(3,3,3) == 3
assert count_equals(2,2,2) == 3
assert count_equals(6,6,3) == 2
assert count_equals(6,6,6) == 3