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 Kotlin (1.3.71) (judge verdict: Accepted)

fun main(args : Array<String>) {
    val s = readLine()!!
    val t = readLine()!!

    val sd = mutableMapOf<Char, Int>()
    val td = mutableMapOf<Char, Int>()

    var dummy = 0

    for (i in s.indices) {
        val si = sd[s[i]] ?: dummy
        val ti = td[t[i]] ?: dummy

        if (si != ti) {
            println("No")
            return
        }

        sd[s[i]] = si
        td[t[i]] = ti
        dummy++
    }

    println("Yes")
}