StringTask.cpp

#include <iostream>
#include <string>
using namespace std;

int main() {
	#ifndef ONLINE_JUDGE
 freopen("input.txt","r",stdin);
 freopen("output.txt","w",stdout);
 #endif
string s,s2;
cin>>s;
int len=s.length();
for(int i=0;i<len;i++){
	if(s[i]=='a'||s[i]=='e'||s[i]=='i'||s[i]=='o'||s[i]=='u'||s[i]=='y'||s[i]=='A'||s[i]=='E'||s[i]=='O'||s[i]=='I'||s[i]=='U'||s[i]=='Y')
		continue;
	else
	{
		s2+='.';
		s2+=tolower(s[i]);
	}
}
	cout<<s2;
	return 0;
}