Problem:
Score : 200 points

Problem Statement

You are given strings s and t, consisting of lowercase English letters.
You will create a string s' by freely rearranging the characters in s.
You will also create a string t' by freely rearranging the characters in t.
Determine whether it is possible to satisfy s' < t' for the lexicographic order.

Notes

For a string a = a_1 a_2 ... a_N of length N and a string b = b_1 b_2 ... b_M of length M, we say a < b for the lexicographic order if either one of the following two conditions holds true:

N < M and a_1 = b_1, a_2 = b_2, ..., a_N = b_N.

There exists i (1 \leq i \leq N, M) such that a_1 = b_1, a_2 = b_2, ..., a_{i - 1} = b_{i - 1} and a_i < b_i. Here, letters are compared using alphabetical order.

For example, xy < xya and atcoder < atlas.

Constraints

The lengths of s and t are between 1 and 100 (inclusive).

s and t consists of lowercase English letters.

Input

Input is given from Standard Input in the following format:

s
t

Output

If it is possible to satisfy s' < t', print Yes; if it is not, print No.

Sample Input 1

yx
axy

Sample Output 1

Yes

We can, for example, rearrange yx into xy and axy into yxa. Then, xy < yxa.

Sample Input 2

ratcode
atlas

Sample Output 2

Yes

We can, for example, rearrange ratcode into acdeort and atlas into tslaa. Then, acdeort < tslaa.

Sample Input 3

cd
abc

Sample Output 3

No

No matter how we rearrange cd and abc, we cannot achieve our objective.

Sample Input 4

w
ww

Sample Output 4

Yes

Sample Input 5

zzz
zzz

Sample Output 5

No

Solution in PHP7 (7.0.15) (judge verdict: Accepted)

<?php
  $s = str_split(trim(fgets(STDIN)));
  $t = str_split(trim(fgets(STDIN)));
  sort($s);
  rsort($t);
  $len = min(count($s),count($t));
  for($i=0; $i<$len; $i++){
      if($s[$i] == $t[$i]){
          unset($s[$i]);
          unset($t[$i]);
      }
  }
  if(count($s) == 0 && count($t)>0){
      echo "Yes";
      exit;
  }
  
  
  
  $len = max(count($s),count($t));
  
  
  
  for($i=0; $i<$len; $i++){
      if(isset($s[$i])) $ss = $s[$i];
      if(isset($t[$i])) $tt = $t[$i];
      if($ss < $tt){
          echo "Yes";
          exit;
      }else{
          echo "No";
          exit;
      }
  }
  echo "No";