#include<iostream>
#include<iomanip>
using namespace std;
int main(){
    try{
        float t;
        string name;
        cin>>t;
        cin>>name;
        if(t<0){throw "Invalid input";}
        else if(name == "Celsius"){
            cout<<fixed<<setprecision(2)<<(t*9.0/5.0)+32.0;
        }
        else if(name=="Fahrenheit"){
            cout<<fixed<<setprecision(2)<<(t-32.0)*5.0/9.0;
        }
        else{
            throw "Invalid input";
        }
    }
        catch(const char*msg){
            cout<<msg;
        }
    }
}