#include <iostream>
#include <string>
#include <vector>
#include <cmath>
#include <algorithm>
#include <cstdlib>
#include <ctime>
#include <cstdio>
#include <functional>
#include <set>
#include <sstream>
#include <map>
#include <queue>
#include <stack>

using namespace std;

unsigned long long get_hash(string s, unsigned long long a, unsigned long long b){
	unsigned long long hash = 0;

	for(int i = 0; i < s.size(); i++){
		hash = (hash * a + s[i]) % b;
	}

	return hash;
}

string get_string(int len){

    string s;
    for(int i=0;i<len;i++) s+='a'+rand()%26;
    return s;

}

int main()
{
    srand(time(NULL));
    unsigned long long a,b;
    cin>>a>>b;
    
    if(b==1){
        cout<<"a\nb"<<endl;
    }
    
    map<unsigned long long,string> hs;
    for(int i=0;i<b;i++){
        string s=get_string(32);
        unsigned long long h=get_hash(s,a,b);
        if(hs.find(h)!=hs.end()){
            cout<<hs[h]<<endl<<s<<endl;
            return 0;
        }else{
            hs[h]=s;
        }
    }

    return 0;
}