func_code_string: #include <bits/stdc++.h>   using namespace std;   const long long mod = 1000000007;   const long long inf = 1LL << 62;   const long long mx = 100005;   const double eps = 1e-10;   long long dx[10] = {1, 0, -1, 0};   long long dy[10] = {0, -1, 0, 1};   long long power(long long a, long long b) {     if (b == 0) return 1;     long long x = power(a, b / 2);     x = x * x;     if (b % 2) x = x * a;     return x;   }   long long Set(long long N, long long pos) { return N = N | (1LL << pos); }   long long reset(long long N, long long pos) { return N = N & ~(1LL << pos); }   bool check(long long N, long long pos) { return (bool)(N & (1LL << pos)); }   string str, ss;   set<string> s;   int main() {     long long tst, a, b, c, k, n, m, res = 0, ans = 0, t = 0;     cin >> str;     n = (long long)(str).size();     for (char ch =  a ; ch <=  z ; ch++) {       ss.clear();       ss.push_back(ch);       ss += str;       s.insert(ss);     }     long long i, j;     for (i = 0; i < n; i++) {       ss.clear();       for (j = 0; j <= i; j++) {         ss.push_back(str[j]);       }       string first = ss;       for (char ch =  a ; ch <=  z ; ch++) {         ss = first;         ss.push_back(ch);         for (j = i + 1; j < n; j++) {           ss.push_back(str[j]);         }         s.insert(ss);       }     }     cout << (long long)(s).size() <<   n ;     return 0;   }   