#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

using ull = unsigned long long;
vector<ll>rolling_hash_search(string s,string t){
    vector<long long >index_list;
    ll SL=s.size();
    ll TL=t.size();

    ull b=1e8+7;
    ull a=1;
    for (int i = 0; i < TL; i++)
    {
        a*=b;
    }
    ull s_hash = 0;
    for (int i = 0; i < TL; i++)
    {
        s_hash=s_hash*b+s[i];
    }
    ull t_hash=0;
    for (int i = 0; i < TL; i++)
    {
        t_hash=t_hash*b+t[i];
    }
    for (int i = 0; i < SL-TL+1; i++)
    {
        if(s_hash==t_hash) index_list.push_back(i);
        if(i+TL<SL) s_hash=s_hash*b-s[i]*a+s[i+TL];
    }
    return index_list;
}

int main(){
    int a,b;
    cin>>a>>b;
    a%=b;
    vector<ll>v(b,-1);
    ll idx=1;
    ll endidx;
    ll swidx;
    ll copy=a;
    v[a]=0;
    while(1){
        copy*=a;
        copy%=b;
        if(v[copy]>=0){
            endidx=idx;
            swidx=v[copy];
            break;
        }
        else{
            v[copy]=idx;
        }
        idx++;
    }
    string s,t;
    for (int i = 0; i <=endidx; i++)
    {
        s.push_back('a');
        t.push_back('a');
    }
    s[endidx]='b';
    t[swidx]='b';
    cout<<s<<endl;
    cout<<t<<endl;
    
}