CF 118A

#include<cstring>
#include<iostream>
#include<vector>
#include<ctype.h>

using namespace std;

int main()
{
 char a[101];
 vector<char>con;
 int i;
 
 while(cin>>a)
 {
  con.clear();
  int l=strlen(a);
  for(i=0; i<l; i++)
  {
   if(a[i]=='A' || a[i]=='a' || a[i]=='I' || a[i]=='i' || a[i]=='e' || a[i]=='E' || a[i]=='o' || a[i]=='O'|| a[i]=='U' || a[i]=='u' || a[i]=='y' || a[i]=='Y')
   {
    continue;
   }
   else {
    char c=tolower(a[i]);
    con.push_back(c);
   }
  }
  
  for(i=0; i<con.size(); i++)
  {
   char cc;
   cc=con[i];
   cout<<"."<<con[i];
  }
  cout<<endl;
 }
 
 return 0;
}