A_Tricky_Template.cpp

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

// Speed
#define fastio() ios_base::sync_with_stdio(false), cin.tie(nullptr), cout.tie(nullptr);

// Macros
#define rep(i,j) for(int i=0;i<j;i++)
#define rrep(i,j) for(int i=j-1;i>=0;i--)
#define all(x) x.begin(), x.end()
#define yes cout<<"YES"<<endl
#define no cout<<"NO"<<endl

// Typedef
typedef long long ll;
typedef pair<int, int> pi;
typedef vector<int> vi;
typedef map<int,int> mii;

void solve(){
    int n;
    cin>>n;
    string a("",n),b("",n),c("",n);
    rep(i,n) cin>>a[i];
    rep(i,n) cin>>b[i];
    rep(i,n) cin>>c[i];
    int cnt=0;
    for(int i=0;i<n;i++){
        if(a[i]==c[i] || b[i]==c[i]){
            cnt++;
        }
    }
    if(cnt==n){
        cout<<"NO"<<endl;
    }
    else{
        cout<<"YES"<<endl;
    }
}

int32_t main()
{
    fastio()
    int t;
    cin >> t;
    while(t--)
    {
        solve();
    }
    return 0;
}