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At school, Panchito´s teacher has asked them to make a simple game that given the length of the sides of a triangle, it can classify them as Isosceles, Scalene or Equilateral.

Help:

• Isósceles: two sides of the same length.

• Scalene: all sides have different lengths.

• Equilateral: all sides are equal.

Input Details:

You should read three integers X, Y, Z be three lengths in the plane.

Output Details:

Only to print that kind of triangle is isosceles, scalene, or equilateral.

Constraints:

0 <= X <= 10000000

0 <= Y <= 10000000

0 <= Z <= 10000000