//program to find common elements in 3 arrays if arrays are sorted.

int n1;

cin>>n1;

int arr[n1];

for(int i=0;i<n1;i++){

cin>>arr[i];

}

int n2;

cin>>n2;

int arr2[n2];

for(int i=0;i<n2;i++){

cin>>arr2[i];

}

int n3;

cin>>n3;

int arr3[n1];

for(int i=0;i<n3;i++){

cin>>arr3[i];

}

int i=0, j=0, k=0;

vector<int> ans;

while(i<n1 && j<n2 && k<n3){

if(arr[i]==arr2[j] && arr2[j]==arr3[k]){

ans.push_back(arr[i]);

i++;j++;k++;

}else if(arr[i]<arr2[j]){

i++;

}else if(arr[j]<arr3[k]){

j++;

}else{

k++;

}

}

return 0;

}