#include <iostream>
#include <string>
using namespace std;
 
class Solution {
public:
    string defangIPaddr(string address) {
        string::size_type i = 0;
        while (i < address.size()){
            if (address[i] == '.'){
                address.replace(i, 1, "[.]");
                i += 3;
            }
            else {
            	++i;
            }
        }
        return address;
    }
};
 
int main()
{
	Solution s;
    cout << s.defangIPaddr("127.0.0.1");
	return 0;
}

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