#include <bits/stdc++.h>
const int MAXINT = 2147483640;
const long long MAXLL = 9223372036854775800LL;
const long long MAXN = 1000000;
using namespace std;
string s;
bool check(long long pos, char c) {
  string s1 = s;
  s1[pos] = c;
  long long n = s1.size() - 1, i = 0, flag = 0;
  while (1) {
    if (s1[i] != s1[n]) {
      return 0;
    }
    i++, n--;
    if (i > n) break;
  }
  return 1;
}
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  long long i, j;
  cin >> s;
  for (i = 0; i < s.size(); i++) {
    for (j = 'a'; j <= 'z'; j++) {
      if (check(i, char(j)) && char(j) != s[i]) {
        cout << "YES" << endl;
        return 0;
      }
    }
  }
  cout << "NO" << endl;
  return 0;
}
