include
using namespace std; int main() { string s; getline(cin, s); int len; len = s.length(); int a = 0; for (int i = 0,j=len-1; i < len/2 ; i++,j—) { if (s[i] == s[j]) {
a = a + 0;
}
else {
a=a+1;
break;
}
}
if (a <= 1) {
cout << "yes";
}
else{
cout << "no";
}
return 0;
}