text: const readline = require("readline");
  const rl = readline.createInterface({
    input: process.stdin,
    output: process.stdout
  });
  
  rl.on("line", function(line) {
    const [a, b] = line.split(' ').map(i => parseInt(i));
    console.log(a + b);
    rl.close();
  }).on("close", function() {
    process.exit();
  });
  