118A - string task.cpp

#include<iostream>
#include<math.h>
#include<bits/stdc++.h>
using namespace std;
int main(){
string str;
cin>>str;
//given vowels (a,e,i,o,u,y)
for(int i=0;i<str.length();i++){
    char c=tolower(str[i]);
    if(c!='a'&&c!='e'&&c!='i'&&c!='o'&&c!='u'&&c!='y')
        cout<<"."<<c;
}
}