process.stdin.setEncoding('utf8');

process.stdin.on('readable', () => {
  const chunk = process.stdin.read();
  var lines = chunk.split("\n");
  var args = lines[0].split(" ");
  if (chunk !== null) {
    process.stdout.write(args[0]);
  }
});

process.stdin.on('end', () => {
  process.stdout.write('end');
});