#include <iostream>
using namespace std;
int main() {
int x;
cin>>x;
if(x<0){
cout<<"T"<<endl;
}
else{
string str= to_string(x);
int a=0,b=str.length()-1;
while(a<=b){
if(str[a]!=str[b]){
cout<<"F"<<endl;
return 0;
}
a++;
b--;
}
cout<<"T"<<endl;
}
return 0;
}
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