#include <bits/stdc++.h> using namespace std; int main() { int count = 0; for(int i = 97;i <= 122;i++) { count++; cout<<char(i); if(count % 13 == 0) { cout<<endl; } } for(int i = 122;i >= 97;i--) { count++; cout<<char(i); if(count % 13 == 0) { cout<<endl; } } return 0; }