#include<bits/stdc++.h>
using namespace std;
int ans;
string s;
int ans1;
void part1()
{
	for(int i=0;i<s.size();i++)
	{
		if(s[i]>='a'&&s[i]<='z'||s[i]>='A'&&s[i]<='Z')
		{
			putchar('.');
			ans++;
		}
		else
		{
			putchar(s[i]);
		}
	}
	putchar('\n');
	return ;
}
void part2()
{
	int t=ans/3;
	int i=0;
	while(t>0)
	{
		if(s[i]>='a'&&s[i]<='z'||s[i]>='A'&&s[i]<='Z')
		{
			putchar(s[i]);
			t--;
		}
		else
		{
			putchar(s[i]);
		}
		i++;
	}
	for(i;i<s.size();i++)
	{
		if(s[i]>='a'&&s[i]<='z'||s[i]>='A'&&s[i]<='Z')
			putchar('.');
		else
			putchar(s[i]);
		if(s[i]=='a'||s[i]=='e'||s[i]=='i'||s[i]=='o'||s[i]=='u'||s[i]=='A'||s[i]=='E'||s[i]=='I'||s[i]=='O'||s[i]=='U')
		{
			ans1++;
		}
	}
	putchar('\n');
	return ;
}
void part3()
{
	
	if(!ans1)
	{
		int t=ans*2/3;
		int j=0;
		while(t>-1)
		{
			if(s[j]>='a'&&s[j]<='z'||s[j]>='A'&&s[j]<='Z')
			{
				putchar(s[j]);
				t--;
			}
			else
			{
				putchar(s[j]);
			}
			j++;
		}
		for(j;j<s.size();j++)
		{
			if(s[j]>='a'&&s[j]<='z'||s[j]>='A'&&s[j]<='Z')
				putchar('.');
			else
				putchar(s[j]);
		}
	}
	else
	{
		for(int k=0;k<=ans/3;k++)
		{
			putchar(s[k]);
		}
		int t=s.size()-1;
		int j=0;
		while(t>ans/3)
		{
			if(s[j]>='a'&&s[j]<='z'||s[j]>='A'&&s[j]<='Z')
			{
				if(s[j]=='a'||s[j]=='e'||s[j]=='i'||s[j]=='o'||s[j]=='u'||s[j]=='A'||s[j]=='E'||s[j]=='I'||s[j]=='O'||s[j]=='U')
				{	
					putchar(s[j]);
					t--;
				}
				else
				{
					putchar('.');
				}
			}
			else
			{
				putchar(s[j]);
			}
			j++;
		}
	}
}
int main()
{
	getline(cin,s);
	part1();
	part2();
	part3();
	return 0;
	}

/*
Upomoc! Lpv s nm pkrl sv smglsnk.
......! ... . .. .... .. ........ 
Upomoc! Lp. . .. .... .. ........ 
Upomoc! Lpv s nm pkrl s. ........

*/