For three days, both sides exchanged artillery fire without either making progress.

During the attacks, the two sides also exchanged the throwing of stones.

However, the two sides exchanged cannon fire and men lay dead in the valley.

Both sides also exchanged prisoners of war for first time.

The two sides have already exchanged charges in radio commercials.

United States officials said the two sides were still exchanging ideas tonight about how these issues might be resolved.

With that touch of reality in mind, the two sides exchanged proposals, or at least ideas, on the tax.

If the contract had not been completed, the two sides would have exchanged numbers today, the agent said.