#include <bits/stdc++.h>
#include <iostream>

using namespace std;

bool isOK(string table,string cards){
    if (table[0]==cards[0] || table[1]==cards[1])
        return true;
    else
        return false;
}

int main()
{
    bool ok = false;
    string table,cards;
    cin >> table;
    for (int i=0;i<5;i++){
        cin >> cards;
        ok = isOK(table,cards);
        if (ok == true){
            break;
        }
    }
    if (ok == true)
        cout << "YES";
    else
        cout << "NO";



    return 0;
}