#include <bits/stdc++.h>
using namespace std;
#define MAXN 50005
#define MAXSZ 2050
#define INF 999999999
#define pb push_back
typedef long long ll;
typedef pair <int, int> pii;
typedef vector <ll> vi;
int arr1[MAXN], arr2[MAXN];
string sArr1[MAXN], sArr2[MAXN];
int main(){
cin.tie(0);
ios::sync_with_stdio(false);
int n;
cin >> n;
map <string, int> mapa;
string in;
int aux;
bool isNum;
for(int i = 1; i <= n; i++){
cin >> in;
isNum = true;
if(in.size() <= 4){
for(auto c : in){
aux = c - '0';
if(aux < 0 or aux > 9){
isNum = false;
break;
}
}
} else isNum = false;
if(isNum){
arr1[i] = stoi(in);
sArr1[i] = "";
} else {
arr1[i] = -1;
sArr1[i] = in;
}
}
for(int i = 1; i <= n; i++){
cin >> in;
isNum = true;
if(in.size() <= 4){
for(auto c : in){
aux = c - '0';
if(aux < 0 or aux > 9){
isNum = false;
break;
}
}
} else isNum = false;
if(isNum){
arr2[i] = stoi(in);
sArr2[i] = "";
} else {
arr2[i] = -1;
sArr2[i] = in;
}
}
bool ok = true;
for(int i = 1; i <= n && ok; i++){
if(arr1[i] != -1){
if(arr2[i] != -1 && arr2[i] != arr1[i]) ok = false;
else if(arr2[i] == -1){
if(!mapa[sArr2[i]]) mapa[sArr2[i]] = arr1[i];
else if(mapa[sArr2[i]] != arr1[i]) ok = false;
}
} else {
if(arr2[i] == -1){
if(!mapa[sArr1[i]] && !mapa[sArr2[i]]) continue;
if(mapa[sArr1[i]] && !mapa[sArr2[i]]) mapa[sArr2[i]] = mapa[sArr1[i]];
else if(!mapa[sArr1[i]] && mapa[sArr2[i]]) mapa[sArr1[i]] = mapa[sArr2[i]];
else if(mapa[sArr1[i]] != mapa[sArr2[i]]) ok = false;
}
else if(arr2[i] != -1){
if(!mapa[sArr1[i]]) mapa[sArr1[i]] = arr2[i];
else if(mapa[sArr1[i]] != arr2[i]) ok = false;
}
}
}
for(int i = 1; i <= n && ok; i++){
if(arr1[i] != -1){
if(arr2[i] != -1 && arr2[i] != arr1[i]) ok = false;
else if(arr2[i] == -1){
if(!mapa[sArr2[i]]) mapa[sArr2[i]] = arr1[i];
else if(mapa[sArr2[i]] != arr1[i]) ok = false;
}
} else {
if(arr2[i] == -1){
if(!mapa[sArr1[i]] && !mapa[sArr2[i]]) continue;
if(mapa[sArr1[i]] && !mapa[sArr2[i]]) mapa[sArr2[i]] = mapa[sArr1[i]];
else if(!mapa[sArr1[i]] && mapa[sArr2[i]]) mapa[sArr1[i]] = mapa[sArr2[i]];
else if(mapa[sArr1[i]] != mapa[sArr2[i]]) ok = false;
}
else if(arr2[i] != -1){
if(!mapa[sArr1[i]]) mapa[sArr1[i]] = arr2[i];
else if(mapa[sArr1[i]] != arr2[i]) ok = false;
}
}
}
cout << (ok ? "DA" : "NE") << endl;
return 0;
}
