text: var express = require('express')
  var app = express()
  var bodyparser = require('body-parser')
  
  app.use(bodyparser.urlencoded({
    extended: false
  }))
  
  app.post('/form', function (req, res) {
    res.send(req.body.str.split('').reverse().join(''))
  })
  
  app.listen(process.argv[2])
  