#include <bitset>
#include <cstdint>
#include <iostream>

using ll = int64_t;

constexpr ll maxn = 3e4;
ll n,m,q;
std::bitset<maxn+5> bs[maxn+5];
std::bitset<maxn+1> none;

int main(){
    std::cin>>n>>m>>q;
    for(ll i=1;i<=n;i++){
        static ll num;
        std::cin>>num;
        for(ll j=1;j<=num;j++){
            static ll tmp;
            std::cin>>tmp;
            bs[i][tmp]=true;
        }
    }
}