#include<iostream>
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
using namespace std;
int n, ans[100001], t = 0;
void make()
{ if (n == 2)
  { cout << "AB" << endl;
    cout << "22" << endl;
   }
  
  else if (n == 4)
  { cout << "AAB" << endl;
    cout << "2222" << endl;
   }
  
  else if (n == 6)
  { cout << "AABB" << endl;
    cout << "112222" << endl;
   }
  
  else if (n % 2 == 0)
  { for (int i = 0; i < (n - 2) / 2; i++)
    printf("A");
    
    for (int i = 0; i < (n - 2) / 2; i++)
    printf("B");
    
    printf("\n");
    
    for (int i = 0; i < n; i++)
    printf("2");
    printf("\n");
   }
  
  else
  { for (int i = 0; i < n / 2 + 1; i++)
    printf("A");
    
    for (int i = 0; i < n / 2; i++)
    printf("B");
    
    printf("\n");
    
    printf("1");
    for (int i = 0; i < n - 1; i++)
    printf("2");
    printf("\n");
   }
}

int main()
{ 
  scanf("%d", &n);
  make();
  
  return 0;
}
