#include <bits/stdc++.h>   using namespace std;   mt19937 mt_rand(time(0));   const int N = 105;   int t, n;   char a[N], b[N], c[N];   int main() {     scanf( %d , &t);     while (t--) {       scanf( %s%s%s , a, b, c);       n = 0;       while (a[n]) n++;       bool ok = 1;       for (int i = 0; i < n; i++) {         if (c[i] == a[i] || c[i] == b[i])           ;         else           ok = 0;       }       if (!ok)         printf( NO n );       else         printf( YES n );     }     return 0;   }   