Problem:
Score : 300 points

Problem Statement

You are given strings S and T consisting of lowercase English letters.

You can perform the following operation on S any number of times:

Operation: Choose two distinct lowercase English letters c_1 and c_2, then replace every occurrence of c_1 with c_2, and every occurrence of c_2 with c_1.

Determine if S and T can be made equal by performing the operation zero or more times.

Constraints

1 \leq |S| \leq 2 \times 10^5

|S| = |T|

S and T consists of lowercase English letters.

Input

Input is given from Standard Input in the following format:

S
T

Output

If S and T can be made equal, print Yes; otherwise, print No.

Sample Input 1

azzel
apple

Sample Output 1

Yes

azzel can be changed to apple, as follows:

Choose e as c_1 and l as c_2. azzel becomes azzle.

Choose z as c_1 and p as c_2. azzle becomes apple.

Sample Input 2

chokudai
redcoder

Sample Output 2

No

No sequences of operation can change chokudai to redcoder.

Sample Input 3

abcdefghijklmnopqrstuvwxyz
ibyhqfrekavclxjstdwgpzmonu

Sample Output 3

Yes

Solution in C (GCC 5.4.1) (judge verdict: Accepted)

#include<stdio.h>
#include<stdlib.h>
int cmp(const void *a,const void *b){
  return *(char*)b - *(char*)a;
}

int main(){
  char s[200001] = {};
  char t[200001] = {};
  char letter[26] = {};
  int lcnt = 0;
  int n = 0;
  int i = 0;
  int flag = 1;
  scanf(" %s",s);
  scanf(" %s",t);
  for(i=0;i<200001;i++){
    if(s[i] == '\0'){
      break;
    }
  }
  n = i;
  for(i=0;i<26;i++){
    letter[i] = 'X';
  }
  
  for(i=0;i<n;i++){
    if(letter[s[i] - 'a']  == 'X'){
      letter[s[i] - 'a'] = t[i];
      lcnt++;
    }else if(letter[s[i] - 'a'] != t[i]){
      flag = 0;
      break;
    }
  }
  //printf("%d",n);
  /*for(i=0;i<26;i++){
    printf("%c",letter[i]);
  }*/
  qsort(letter,26,sizeof(char),cmp);
  for(i=1;i<lcnt;i++){
    if(letter[i] == letter[i-1]){
      flag = 0;
    }
          //printf("%c %d",letter[i],lcnt);
  }
  if(flag){
    printf("Yes");
  }else{
    printf("No");
  }
  return 0;
}