function age()   {return real(1,120)}

BEGIN{ def(_Names, "tom,tim,tam")}
function name()   { return nominal(_Names) }
function waits(m,s)   { return normal(m,s) }


function _age(  str) {
	str="age";
	if (str in Cache) return Cache[str];
	return Cache[str]=age()
} 
function _name(  str) {
	str="name";
	if (str in Cache) return Cache[str];
	return Cache[str]=name()
} 
function _waits(m,s,    str) {
	str="waits/" m "/" s;
	if (str in Cache) return Cache[str];
	return Cache[str]=waits(m,s)
}