#include <bits/stdc++.h>
using namespace std;

bool isAnagram(string s, string t) {
        if(s.size()!=t.size())return false;
        map<char,int>m;
        for(int i=0;i<s.size();i++){
            m[s[i]]++;
            m[t[i]]--;
        }
        for(auto x:m){
           if(x.second!=0)return false;
        }

        return true;
    }
int main() {
	string s,t;cin>>s>>t;
	if(isAnagram(s,t)){
		cout<<"Yes"<<endl;
	}else{
		cout<<"No"<<endl;
	}
	return 0;
}