var buffers = [];

process.stdin.on('readable', function(chunk) {
  var chunk = process.stdin.read();
  if (chunk !== null) {
    buffers.push(chunk);
  }
});

process.stdin.on('end', function() {
  console.log(Buffer.concat(buffers));
});

var buffers = [];

process.stdin.on('readable', function() {
  var chunk = process.stdin.read();
  if (chunk !== null) {
    buffers.push(chunk);
  }
});

process.stdin.on('end', function() {
  console.log(Buffer.concat(buffers));
});

Remove unnecessary argument to 'readable' callback
Remove unnecessary argument to 'readable' callback
