#include <bits/stdc++.h>
using namespace std;
bool checkpalin(string s) {
  string temp = s;
  reverse(temp.begin(), temp.end());
  if (s.compare(temp) == 0)
    return true;
  else
    return false;
}
int main() {
  string s;
  cin >> s;
  int i = 0;
  int j = s.length() - 1;
  if (s.length() % 2 == 0) {
    while (i != j + 1) {
      if (s[i] != s[j]) {
        s[j] = s[i];
        if (checkpalin(s)) {
          cout << "YES" << endl;
          return 0;
        } else {
          cout << "NO" << endl;
          return 0;
        }
      }
      i++;
      j--;
    }
    cout << "NO" << endl;
  } else {
    while (i != j) {
      if (s[i] != s[j]) {
        s[j] = s[i];
        if (checkpalin(s)) {
          cout << "YES" << endl;
          return 0;
        } else {
          cout << "NO" << endl;
          return 0;
        }
      }
      i++;
      j--;
    }
    cout << "YES" << endl;
  }
}
