using System;
using System.Console;
using System.Math;

module Composition
{
    Compose[T](f : T -> T, g : T -> T, x : T) : T
    {
        f(g(x))
    }

    Main() : void
    {
        def SinAsin = Compose(Sin, Asin, _);
        WriteLine(SinAsin(0.5));
    }
}