#include <bits/stdc++.h>
using namespace std;
bool palin(char *s, int len) {
  int i = 0, j = len - 1;
  while (i < j)
    if (s[i++] != s[j--]) return false;
  return true;
}
bool exist(char *s) {
  int n = (int)strlen(s);
  if (palin(s, n)) return n & 1;
  for (int i = 0; i <= n >> 1; i++) {
    char old = s[i];
    s[i] = s[n - i - 1];
    if (palin(s, n)) return true;
    s[i] = old;
  }
  return false;
}
int main() {
  char s[32];
  cin >> s;
  cout << (exist(s) ? "YES" : "NO") << endl;
  return 0;
}
