#include <cstdio>
#include <cstring>

using namespace std;

int i,N;

int main()
{
scanf("%d",&N);

for (i=2,printf("A");i<=N-2;++i)
printf("B");

printf("\n");

for (i=1;i<=N-3;++i)
printf("2");

printf("121\n");

return 0; 
}
