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/* global -Promise */

var Promise = require('bluebird');

function a(value){
  return new Promise(function (resolve){
  value++;
  resolve(value);
  });
}

function b(value){
  return new Promise(function (resolve){
    value = value + 2;
    resolve(value);
  });
}

function print(value){
  return console.log(value);
}

var v = 1;

a(v).then(b).then(print);