function* inner() {
  yield 1;
  yield 2;
  return 'inner-done';
}

function* outer() {
  const result = yield* inner();
  yield result;
  yield 3;
}

const gen = outer();
const results = [];
let r = gen.next();
while (!r.done) {
  results.push(r.value);
  r = gen.next();
}
console.log(results.join(','));

export {};