#include <iostream>
using namespace std;

int main()
{
    string s,k;
    int l, n;
    cin >> s;
    k = append (s[0]);
    k = append ('.');
    l = s.find (" ");
    k = append (s[l + 1]);
    k = append ('.');
    n = s.find (" ", l);
    k = append ('.');
    cout << k;
}