text: var fs = require('fs');
  var zlib = require ('zlib');
  
  //decompress the file input.txt.gz to input.txt
  fs.createReadStream('input.txt.gz')
  	.pipe(zlib.createGunzip())
  	.pipe(fs.createWriteStream('input.txt'));
  	
  console.log('file decompressed');
  