What type of triangle?

Determine the type of a triangle (equilateral, isosceles, or scalene) based on the given side lengths.

Input

One line contains $3$ integers, representing the lengths of the triangle's sides. The side lengths do not exceed $100$.

Output

Print $1$ if the triangle is equilateral, $2$ if it is isosceles, and $3$ if it is scalene.

Examples