#include <bits/stdc++.h>

#define pb push_back
#define mp make_pair
#define sz size
#define ll long long
#define ld long double
#define fs first
#define sc second
#define forn(i, f, t) for(int i = f; i < t; i++)
#define all(x) (x).begin(), (x).end()
#define ins insert

const int INF = 2147483647;
const int MOD = 1000000007;
const ll INF64 = 9223372036854775807;
const ld EPS = 1e-7;

using namespace std;


int main(){
    printf("50000\n");
    forn(i, 0, 49999) printf("%d ", 1000000000);
    printf("1000000000\n");
    forn(i, 0, 49999)
        cout << "za\n";
    cout << "b\n";
    return 0;
}