#include <bits/stdc++h>

using namespace std;

long long n,k,i,a,b,c;
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;
}