//\\__ hr1212 __//\\
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef vector<int> vi;
typedef pair<int,int> pii;
typedef map<int,int> mi;
#define si(a) scanf("%d",&a)
#define sii(a,b) scanf("%d %d",&a,&b)
#define siii(a,b,c) scanf("%d %d %d",&a,&b,&c)
#define pi(a) printf("%d",a)
#define nl printf("\n");
#define pb push_back
#define mp make_pair
#define all(c) (c).begin(),(c).end()
#define f(i,a,b) for(i=a;i<b;i++)
#define rf(i,a,b) for(i=a;i>=b;i--)
#define clr(x,a) memset(x,a,sizeof(x))
#define MAX 1000100
#define MOD 1000000007
int n,m,a[MAX],b[MAX];
vector<pii > v[MAX];
int main(){
int r,k,i,c=0,x=0,y=0,j,t,l,z,x1=0,y1=0;
ll ans=0;string p;
while(sii(n,m)!=EOF){
f(i,1,n+1){
si(x);
f(j,0,x){
si(a[j]);
}
f(j,0,x){
si(b[j]);
}
f(j,0,x){
v[a[j]].pb(mp(i,b[j]));
}
}
printf("%d %d\n",m,n);
f(i,1,m+1){
pi(v[i].size());
f(j,0,v[i].size()){
printf(" %d",v[i][j].first);
}
nl;
f(j,0,v[i].size()){
printf("%d",v[i][j].second);
if(j!=v[i].size()-1)
printf(" ");
}
nl;
v[i].clear();
}
}
return 0;
}
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef vector<int> vi;
typedef pair<int,int> pii;
typedef map<int,int> mi;
#define si(a) scanf("%d",&a)
#define sii(a,b) scanf("%d %d",&a,&b)
#define siii(a,b,c) scanf("%d %d %d",&a,&b,&c)
#define pi(a) printf("%d",a)
#define nl printf("\n");
#define pb push_back
#define mp make_pair
#define all(c) (c).begin(),(c).end()
#define f(i,a,b) for(i=a;i<b;i++)
#define rf(i,a,b) for(i=a;i>=b;i--)
#define clr(x,a) memset(x,a,sizeof(x))
#define MAX 1000100
#define MOD 1000000007
int n,m,a[MAX],b[MAX];
vector<pii > v[MAX];
int main(){
int r,k,i,c=0,x=0,y=0,j,t,l,z,x1=0,y1=0;
ll ans=0;string p;
while(sii(n,m)!=EOF){
f(i,1,n+1){
si(x);
f(j,0,x){
si(a[j]);
}
f(j,0,x){
si(b[j]);
}
f(j,0,x){
v[a[j]].pb(mp(i,b[j]));
}
}
printf("%d %d\n",m,n);
f(i,1,m+1){
pi(v[i].size());
f(j,0,v[i].size()){
printf(" %d",v[i][j].first);
}
nl;
f(j,0,v[i].size()){
printf("%d",v[i][j].second);
if(j!=v[i].size()-1)
printf(" ");
}
nl;
v[i].clear();
}
}
return 0;
}
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