#include <bits/stdc++.h>

using namespace std;

int main()
{
    char s[100],r[100];
int q,count=0,c=0;
char p[100]="hackerrank";
cin>>q;
    cin>>s;
    cin>>r;

int l=strlen(s);
int m=strlen(p);
int n=strlen(r);
int a=0,b=0;
while(a<l)
{
    if(s[a]==p[b])
    {
        a++;
        b++;
        count++;
    }
    else
        a++;
}
a=0;
b=0;
while(a<n)
{
    if(r[a]==p[b])
    {
        a++;
        b++;
        c++;
    }
    else
        a++;
}
if(count==m)
{
 cout<<"YES"<<endl;
}
else
{
    cout<<"NO"<<endl;
}

if(c==m)
    cout<<"YES"<<endl;
else
    cout<<"NO"<<endl;
    return 0;
}