#include <bits/stdc++.h>   using namespace std;   int main() {     string a, b, c, d, e, f, g;     cin >> a >> b >> c >> d >> e >> f;     if (a[0] == b[0] || a[0] == b[1] || a[0] == c[0] || a[0] == c[1] ||         a[0] == d[0] || a[0] == d[1] || a[0] == e[0] || a[0] == e[1] ||         a[0] == f[0] || a[0] == f[1] || a[1] == b[0] || a[1] == b[1] ||         a[1] == c[0] || a[1] == c[1] || a[1] == d[0] || a[1] == d[1] ||         a[1] == e[0] || a[1] == e[1] || a[1] == f[0] || a[1] == f[1])       cout <<  YES ;     else       cout <<  NO ;   }   