Question: If a, b and c are the sides of a triangle, a right triangle complies the formula c² = a² + b². You are given the sides of three triangles, How many of them are right triangles?

Input specification: You will be given 3 integers in three lines. (a, b and c) where 0 ≤ (a, b and c) ≤ 1 million.

Output specification: Show one number, the number of right triangles.

Explanation: for the first sample:52 = 32 + 42 and 132 = 122 + 52 comply but the other number triple does not comply the pythagorean theorem. For the second sample, only one number triple (152 = 122 + 92) complies the pythagorean theorem.