What should the order be?

messyMess.js

var Q = require("q");

var promise = Q.resolve("ok");

promise
	.then(function(v){
		console.log("then1");
	})
	.fin(function(){
		console.log("fin1");
	})
	.end();

promise
	.then(function(v){
		console.log("then2");
	})
	.then(function(v){
		console.log("then2.1");
	})
	.fin(function(){
		console.log("fin2.1");
	})
	.then(function(){
		console.log("then2.2");
	})
	.fin(function(){
		console.log("fin2.3");
	})
	.end();


promise
	.then(function(){
		console.log("then3");
	})
	.fin(function(){
		console.log("fin3");
	})
	.end();

output.txt

then1
then2
then3
fin1
then2.1
fin3
fin2.1
then2.2
fin2.3