#define rep(i,n) for(int i=0;i<(int)(n);i++)
#define ALL(v) v.begin(),v.end()
typedef long long ll;

#include <bits/stdc++.h>
#include <atcoder/maxflow>
using namespace std;
using namespace atcoder;

const ll INF=1e18+7;

int main(){
  int n;
  ll m;
  cin>>n>>m;
  
  mf_graph<ll> graph(500);
  
  ll sum=0;
  for(int i=1;i<=n;i++){
    int k;
    ll c;
    cin>>k>>c;
    if(m-c>=0){
      sum+=m-c;
      graph.add_edge(0,i,m-c);
      graph.add_edge(i,n+1,0);
    }
    else{
      graph.add_edge(0,i,0);
      graph.add_edge(i,n+1,c-m);
    }
    if(k==0) continue;
    vector<int> A(k);
    vector<ll> B(k);
    rep(j,k) cin>>A[j];
    rep(j,k) cin>>B[j];
    rep(j,k){
      int t=20*i+A[j]+30;
      sum+=B[j];
      graph.add_edge(0,t,B[j]);
      graph.add_edge(t,i,INF);
      graph.add_edge(t,A[j],INF);
    }
  }
  
  cout<<sum-graph.flow(0,n+1)<<endl;
  
  return 0;
}