#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]]&&m1[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");
}