This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#define fast ios_base::sync_with_stdio(0),cin.tie(0),cout.tie(0)
#define It it=se.begin();it!=se.end();it++
#define mem(dp,i) memset(dp,i,sizeof(dp))
#define all(x) begin(x),end(x)
#define unmap unordered_map
#define pii pair<int,int>
#include <bits/stdc++.h>
#define pll pair<ll,ll>
#define vll vector<ll>
#define vi vector<int>
#define ld long double
#define ll long long
#define pb push_back
#define sh short int
#define mid (l+r)/2
#define S second
#define F first
#define sqr 447
using namespace std;
const int inf = 1e9+9;
const int mod = 1e9+7;
const ld pai=acos(-1);
int n;
string a[50009];
string b[50009];
set < string > s,se;
map < string , bool > dn;
map < string , bool > done;
map < string , string > val;
map < string , vector < string > > v;
void dfs(string node){
dn[node] = 1;
if(done[node]) s.insert(val[node]);
for(auto u:v[node]){
if(!dn[u]) dfs(u);
}
}
int main(){
fast,cin>>n;
for(int i=0;i<n;i++) cin>>a[i];
for(int i=0;i<n;i++) cin>>b[i];
for(int i=0;i<n;i++){
int id1 = a[i][0]-'0';
int id2 = b[i][0]-'0';
if(id1 < 0 || id1 > 9){
se.insert(a[i]);
if(id2 < 0 || id2 > 9){
se.insert(b[i]);
v[a[i]].pb(b[i]);
v[b[i]].pb(a[i]);
}
else{
if(done[a[i]] && val[a[i]] != b[i]){
cout<<"NE"<<endl;
return 0;
}
done[a[i]] = 1,val[a[i]] = b[i];
}
}
else if(id2 < 0 || id2 > 9){
se.insert(b[i]);
if(done[b[i]] && val[b[i]] != a[i]){
cout<<"NE"<<endl;
return 0;
}
done[b[i]] = 1,val[b[i]] = a[i];
}
}
for(int i=0;i<n;i++){
if(!dn[a[i]]){
s.clear(),dfs(a[i]);
if(s.size() > 1){
cout<<"NE"<<endl;
return 0;
}
}
if(!dn[b[i]]){
s.clear(),dfs(b[i]);
if(s.size() > 1){
cout<<"NE"<<endl;
return 0;
}
}
}
cout<<"DA"<<endl;
}
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