#include <bits/stdc++.h>
using namespace std;
int main(void){
    int q;
    cin>>q;
    while(q--){
        vector<int>vs1(26,0),vs2(26,0),vt1(26,0),vt2(26,0);
        string s,t;
        cin>>s>>t;
        int flag=0;
        long long rs1=0,rs2=0,rt1=0,rt2=0;
        for(int i=0;i<s.size();i+=2){
            int tmp=s[i]-'a';
            for(int j=tmp+1;j<26;j++){
                rs1+=vs1[j];
            }
            if(vs1[tmp])flag=1;
            vs1[tmp]++;
            tmp=t[i]-'a';
            for(int j=tmp+1;j<26;j++){
                rt1+=vt1[j];
            }
            vt1[tmp]++;
        }
        for(int i=1;i<s.size();i+=2){
            int tmp=s[i]-'a';
            for(int j=tmp+1;j<26;j++){
                rs2+=vs2[j];
            }
            if(vs2[tmp])flag=1;
            vs2[tmp]++;
            tmp=t[i]-'a';
            for(int j=tmp+1;j<26;j++){
                rt2+=vt2[j];
            }
            vt2[tmp]++;
        }
        cout<<(vs1==vt1&&vs2==vt2&&(((rs1%2)==(rs2%2))==((rt1%2)==(rt2%2))||flag)?"Yes":"No")<<endl;
    }
    return 0;
}