#include<iostream>
#include<cstdio>
#include<map>
#include<string>
#include<iterator>
using namespace std;
map<string,string>Map; //创建
map<string,int>s_name,s_country;
int main()
{
int N,M,i;
int max;
string name,country;
// freopen("d:\\in.txt","r",stdin);
while(cin>>N>>M)
{
for(i=1;i<=N;i++)
{
cin>>name>>country;
Map[name]=country;
}
for(i=1;i<=M;i++)
{
cin>>name;
s_name[name]++;
s_country[Map[name]]++;
}
map<string,int>::iterator te=s_country.begin(); //遍历
max=0;
while(te!=s_country.end())
{
if(te->second>max)
{
max=te->second;
}
te++;
}
te=s_country.begin();
while(te!=s_country.end())
{
if(te->second==max)
{
cout<<te->first<<endl;
break;
}
te++;
}
map<string,int>::iterator ta=s_name.begin();
max=0;
while(ta!=s_name.end())
{
if(ta->second>max)
{
max=ta->second;
}
ta++;
}
ta=s_name.begin();
while(ta!=s_name.end())
{
if(ta->second==max)
{
cout<<ta->first<<endl;
break;
}
ta++;
}
Map.erase(Map.begin(),Map.end()); //删除
s_name.erase(s_name.begin(),s_name.end());
s_country.erase(s_country.begin(),s_country.end());
}
return 0;
}