usertype String;

const Alice,Bob,Charlie: Agent;
const Hallo: String;

protocol onetrace(I)
{
	role I
	{
		var input: String;

		recv_!1(I,I, input);
		send_!2(I,I, Hallo);
		recv_!3(I,I, input);
		claim_4(I, Secret, input);
	}
}