template<typename T> _Coroutine Binsertsort {
	T value;					// communication: value passed down/up tree
	void main();				// YOU WRITE THIS ROUTINE
  public:
	_Exception Sentinel {};
	void sort( T value ) {		// value to be sorted
		Binsertsort::value = value;
		resume();
	}
	T retrieve() {				// retrieve sorted value
		resume();
		return value;
	}
};

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