#include <bits/stdc++.h>
using namespace std;
int main() {
  string str;
  cin >> str;
  int n = str.length();
  string a = " ";
  string b = " ";
  for (int i = 0; i < n / 2; i++) {
    a.push_back(str[i]);
  }
  int g = n / 2;
  if (n % 2 == 0) {
    for (int i = n - 1; i >= g; i--) {
      b.push_back(str[i]);
    }
  } else {
    for (int i = n - 1; i > g; i--) {
      b.push_back(str[i]);
    }
  }
  if (a == b && n % 2 == 0) {
    cout << "NO" << endl;
    return 0;
  }
  if (a == b && n % 2 != 0) {
    cout << "YES" << endl;
    return 0;
  }
  for (int i = 0; i < a.length(); i++) {
    int k = a[i];
    a[i] = b[i];
    if (a == b) {
      cout << "YES" << endl;
      return 0;
    }
    a[i] = k;
  }
  cout << "NO" << endl;
  return 0;
}
