#include <bits/stdc++.h>
using namespace std;
int main() {
  ios::sync_with_stdio(false);
  string s;
  cin >> s;
  int br = 0;
  for (int i = 0; i < s.size() / 2; i++) {
    if (s[i] == s[s.size() - i - 1]) continue;
    br++;
  }
  if (br >= 2 || br == 0) {
    if (s.size() % 2 == 1 && br == 0) {
      cout << "YES";
      return 0;
    }
    cout << "NO" << endl;
  } else {
    cout << "YES" << endl;
  }
  return 0;
}
