class Main{
    main():Int {
       {
       let a:Int, b:Int, c:Int in a;
       let a:Int <- 5, b:Int, c:Int in a;
       let a:Int <- a*a, b:Int, c:Int in a;
       let a:Int <- if a then b else c fi, b:Int, c:Int in a;
       let a:Int in let b:Int in let a:Int in a;
       let a:Int in let b:Int in a; a;
	let a: Int <- 1 in let b: Int <- 2 in a + b;
       }
    };
};