#include<iostream>
#include<unordered_map>
using namespace std;
boolisIsomorphic(string s,string t){
    if(s.length() !=t.length())
    return false;
    unordered_map<char,char>m1,m2;
    for(int i=0;i<s.length();i++){
        char c1=s[i];
        char c2=t[i];
        if(m1.count(c1) && m1[c1] !=c2)
        return false;
        if(m2.count(c2) && m2[c2] !=c1)
        return false;
        m1[c1] =c2;
        m2[c2] =c1;
    }
    return true;
}
int main(){
    string s1,s2;
    cin>>s1>s2;
    if(isIsomorphic(s1,s2))
    cout<<"True";
    else
    cout<<"False";
}