// Code by Parsa Eslami
#include <bits/stdc++.h>
#define ll long long
#define pii pair<int,int>
#define pll pair<ll,ll>
#define FOR(i,a,b) for(int i=a;i<=b;i++)
#define FORR(i,a,b) for(int i=a;i>=b;i--)
#define maxm(a,b) a=max(a,b)
#define minm(a,b) a=min(a,b)
#define bit(i,j) ((j>>i)&1)
#define F first
#define S second
#define dmid int mid=(r+l)/2
#define lc 2*id
#define rc 2*id+1
#define err(x) cerr<<#x<<"="<<x<<'\n'
#define pb push_back
#define SZ(x) (int)x.size()
#define all(x) x.begin(),x.end()
using namespace std;
int rand(int a,int b){
return ((rand()%(b-a+1))+a);
}
int32_t main(int argc,char* argv[]){
srand(atoi(argv[1]));
int n=rand(1,5);
int m=rand(1,5);
int L=rand(1,5);
cout<<n<<" "<<m<<'\n';
FOR(i,1,n){
int x=rand(1,5);
FOR(_,1,x) cout<<(char)(rand(0,4)+'a');
cout<<'\n';
}
FOR(_,1,L) cout<<(char)(rand(0,4)+'a');
cout<<'\n';
FOR(i,1,m){
int l=rand(0,L-1);
int r=rand(l+1,L);
cout<<l<<" "<<r<<'\n';
}
return 0;
}
