export function tuple(n: i32): string {
  let result: [string, i32] = ['???', 0];
  result[1] = fib(n);
  if (result[1] % 2 === 0) {
    result[0] = 'pair';
  } else {
    result[0] = 'odd';
  }

  return result[0];
}

enum Parity {Pair, Odd};
export function enumer(n: i32): Parity {
  if (fib(n) % 2 === 0) {
    return Parity.Pair;
  } else {
    return Parity.Pair;
  }
}

export function obj(o:{ str: string, len: u8}): { str: string, len: u8} {
  let result: { str: string, len: u8};
  result.str = o.str;
  result.len = o.str.length;
  return result;
}