func_code_string: #include <bits/stdc++.h>   using namespace std;   string s1 =        What are you doing at the end of the world? Are you busy? Will you save          us? ;   string s2 =  What are you doing while sending   ;   string s3 =   ? Are you busy? Will you send   ;   string s4 =   ? ;   long long M[100005];   char f(long long n, long long k) {     if (n == 0) return s1[k];     if (k < s2.size()) return s2[k];     k = k - s2.size();     if (k < M[n - 1]) return f(n - 1, k);     k = k - M[n - 1];     if (k < s3.size()) return s3[k];     k = k - s3.size();     if (k < M[n - 1]) return f(n - 1, k);     k = k - M[n - 1];     if (k < s4.size()) return s4[k];     k = k - s4.size();     return  . ;   }   int main() {     ios_base::sync_with_stdio(0);     long long q;     cin >> q;     M[0] = s1.size();     for (long long i = 1; i <= 53; i++) {       if (M[i - 1])         M[i] = s2.size() + M[i - 1] + s3.size() + M[i - 1] + s4.size();     }     for (long long i = 54; i <= 100001; i++) M[i] = M[53];     for (long long i = 0; i < q; i++) {       long long n, k;       cin >> n >> k;       long long n2 = n;       if (n2 > 53) n2 = 53;       if (k > M[n2])         cout <<  . ;       else         cout << f(n, k - 1);     }   }   