#include<bits/stdc++.h>
#define int long long
using namespace std;
const int inf=1e18;
int T,a[10],b[10];
void solve(){
    string s,s1;
    cin>>s>>s1;
    int l=s.size();
    for(int i=0;i<l;i++){
        a[(int)(s[i]-'0')]++;
        b[(int)(s1[i]-'0')]++;
    }
    sort(a,a+10);
    sort(b,b+10);
    for(int i=0;i<=9;i++){
        //cout<<a[i]<<' '<<b[i]<<'\n';
        if(a[i]!=b[i]){
            cout<<"No\n";
            return;
        }
    }
    cout<<"Yes\n";
    return;
}
signed main(){
    ios::sync_with_stdio(0);
    cin.tie(0),cout.tie(0);
    cin>>T;
    while(T--){
        solve();
        memset(a,0,sizeof(a));
        memset(b,0,sizeof(b));
    }
    return 0;
}