// Sample code to perform I/O:

process.stdin.resume();
process.stdin.setEncoding("utf-8");
var stdin_input = "";

process.stdin.on("data", function (input) {
    stdin_input += input;                               
    // Reading input from STDIN
});

process.stdin.on("end", function () {
   main(stdin_input);
});

function main(input) {
 
    var data = input.split('\n');
    var num = parseInt(data[0],10);
    var str = data[1];

    myFunction(num,str)
    
       // Writing output to STDOUT
}

// Warning: Printing unwanted or ill-formatted data to output will cause the test cases to fail


// Write your code here
function myFunction(num, str) {
    return process.stdout.write(num *2 + "\n" + str);
}