#include <iostream>

using namespace std;
long long: i;
string s1, s2;
int main()
{
    cin >> n;
    for(i=1; i<=n; i++) {
        cin >> s1 >> s2;
        s1[0]+=32;
        s2[0]+=32;
cout<<s2<<"."<<s1<<"@retratek.com"<<endl;
    }

    return 0;
}