function Main(input: string) {
  const inputs = input.split("\n");
  let a = inputs[0].split('').sort()
  let b = inputs[1].split('').sort()
  
  if (a === b) {
	console.log('YES')	
  } else {
  	console.log('NO')
  }
}
Main(require("fs").readFileSync("/dev/stdin", "utf8"));