function Q(){
  this.data = [];
	this.enq = enq;
	this.deq = deq;
	this.isEmpty = isEmpty;
}
function enq(el){
  typeof(el) == "object" && el.length >= 0 ? this.data = this.data.concat(el) : this.data.push(el);
}
function deq(){
	return this.data.shift();
}
function isEmpty(){
	return this.data.length == 0 ? true : false;
}