func_code_string: #include <bits/stdc++.h>   using namespace std;   int n;   string s1, s2;   int main() {     cin >> n;     if (n == 1) {       cout <<  a na nb nb ;       return 0;     }     s1 = s2 =   ;     int m = n;     while (m > 1) {       if (s1 ==    || s1[s1.size() - 1] ==  b )         s1 +=  aa ;       else         s1 +=  bb ;       m -= 2;     }     if (m) s1 +=  e ;     cout << s1 << endl;     for (char i : s1) {       if (i ==  a )         cout <<  c ;       else if (i ==  b )         cout <<  d ;       else         cout <<  e ;     }     s2 =  z ;     n -= 1;     cout << endl;     while (n > 1) {       if (s2[s2.size() - 1] ==  z  || s2[s2.size() - 1] ==  x )         s2 +=  yy ;       else         s2 +=  xx ;       n -= 2;     }     if (n) s2 +=  k ;     cout << s2 << endl;     for (char i : s2) {       if (i ==  x )         cout <<  y ;       else if (i ==  y )         cout <<  x ;       else         cout << i;     }   }   