#include<iostream>
#include<unordered_map>
using namespace std;
class Isomorphicchecker{
    public:
    bool areIsomorphic(string a,string  b){
    if(a.size()!=b.size())return false;
    unordered_map<char,char>m1,m2;
    for(int i=0;i<a.size();i++)
       if((m1[a[i]]&&[a[i]]!=b[i])||(m2[b[i]]&&m2[b[i]]!=a[i]))return false;
       else m1[a[i]]=b[i],m2[b[i]]=a[i];
       return true;
    }
};
int main(){
    string s1,s2;
    cin>>s1>>s2;
    cout<<(Isomorphicchecker().areIsomorphic(s1,s2)?"True":"False");
    
}