String Task

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

int main() {
    char c;
    while(cin>>c){
        c=tolower(c);
        if ((c!='a')&&(c!='e')&&(c!='i')&&(c!='o')&&(c!='u')&&(c!='y'))
            printf(".%c",c);
    }
    printf("\n");
    return 0;
}