const main = require('fs').readFileSync('/dev/stdin','utf8').trim();
// console.log(main);
const array = main.split("\n");
// console.log(array);
const moji1 = array[0].split("");
const moji2 = array[1].split("");
moji1.sort();
moji2.sort();
// console.log(moji1);
var result =JSON.stringify(moji1) === JSON.stringify(moji2);
if (result === true) {
    console.log("YES");
} else {
    console.log("NO");
}