lines = [];
let reader = require('readline').createInterface({
  input: process.stdin,
  output: process.stdout
});

reader.on('line', function(line) {
  lines.push(line);
});

reader.on('close', function(line) {
  let A = lines[0].split("");
  let B = lines[1].split("");

  if(A.sort().toString() === B.sort().toString()) {
    return console.log('YES');
  }
  else {
    return console.log('NO');
  }
});