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 Python (3.4.3) (judge verdict: Accepted)

# coding: utf8

if __name__ == "__main__":
    s = input()
    t = input()
    map_s = {}
    map_t = {}
    for i in range(len(s)):
        if s[i] not in map_s:
            map_s[s[i]] = t[i]
        else:
            if map_s[s[i]] != t[i]:
                print("No")
                i = 0
                break
        if t[i] not in map_t:
            map_t[t[i]] = s[i]
        else:
            if map_t[t[i]] != s[i]:
                print("No")
                i = 0
                break
    if i == len(s) - 1:
        print("Yes")