#include<bits/stdc++.h>
using namespace std;
#define endl '\n'
typedef long long ll;
#define debug(x) cout<<#x<<": "<<x<<endl
#define rep(i, a, b) for(int i = (a); i <= (b); i++)
#define per(i, a, b) for(int i = (a); i >= (b); i--)
#define sz(a) a.size()
#define all(a) a.begin(),a.end()
typedef pair<ll, ll> pll;

void solve()
{
    string a, b, c;
    cin >> a >> b >> c;
    bool f = 1;
    rep(i, 0, sz(c) - 1) {
        if(c[i] != a[i] && c[i] != b[i]) {
            f = 0;
            break;
        }
    }
    if((sz(a) != sz(b)) || (f && sz(c) == sz(a))) {
        cout << "NO" << endl;
    }
    else {
        cout << "YES" << endl;
    }
}

int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0),cout.tie(0);
    int T=1;
    cin>>T;
    while(T--)
    {
        solve();
    }
    return 0;
}