#include <iostream>
#include <sstream>
using namespace std;
int main() {
string inputstr("Ivanov Sidor Efremovich");
stringstream temp(inputstr);
string F,I,O;
temp>>F>>I>>O;
string outstr=string("")+I[0]+"."+O[0]+". "+F;
cout<<outstr;
return 0;
}
I2luY2x1ZGUgPGlvc3RyZWFtPgojaW5jbHVkZSA8c3N0cmVhbT4gCnVzaW5nIG5hbWVzcGFjZSBzdGQ7CgppbnQgbWFpbigpIHsKCXN0cmluZyBpbnB1dHN0cigiSXZhbm92IFNpZG9yIEVmcmVtb3ZpY2giKTsKCQoJc3RyaW5nc3RyZWFtIHRlbXAoaW5wdXRzdHIpOwoJc3RyaW5nIEYsSSxPOwoJdGVtcD4+Rj4+ST4+TzsKCXN0cmluZyBvdXRzdHI9c3RyaW5nKCIiKStJWzBdKyIuIitPWzBdKyIuICIrRjsKCgljb3V0PDxvdXRzdHI7CglyZXR1cm4gMDsKfQ==