4:1

#include<bits/stdc++.h>
using namespace std;
bool vowelcheck(char c)
{
    return (c=='a'||c=='e'||c=='i'||c=='o'||c=='u');
}
int main()
{
    string s;
    cin>>s;
    for(int i=0;i<s.size();i++)
    {
        char c=tolower(s[i]);
        if(vowelcheck(c)!=1)
        {
            cout<<"."<<c;
        }
    }
}