Extract words from a file and put them into a `std::vector` of `std::array

The following is the file(ka.txt) from which I want to read lines :-

ASD|BSD|CSdsa|ood
fmads|aok|pdski
kdijf|okmdsomf|opkasd|okd
asdas
kamkd|aoda|kked|ok

The following is the code that I've written to put this data into a vector of std::array<std::string, 4>.

#include <iostream>
#include <string>
#include <vector>
#include <array>
#include <fstream>
#include <sstream>
int main(){
        std::fstream file("ka.txt");
        std::vector<std::array<std::string, 4>> darr; darr.reserve(5);
        std::array<std::string, 4> istd;
        std::string * line = new std::string; std::string * word = new std::string;
        while(std::getline(file, *line)){
                std::stringstream ss(*line);
                int per = 0;
                while(!ss.eof()){
                        std::getline(ss, *&istd[per], '|');
                        per++;
                }       
                darr.emplace_back(istd);
        }       
        file.close();
        
        for(int i = 0; i < darr.size(); i++){
                for(int j = 0; j < 4; j++){
                        std::cout << darr[i][j] << "\t";
                }       
                std::cout << "\n";
        }       
  
        return 0;       
}

Basically, I have a vector which has std::array's and each std::array is of size 4. So I am reading the data from the file with | delimiter. And I want to store each element in every row of the text file as a std::array. And storing these std::arrays in one vector. Also, if one row has 4 elements separated by |, then there should be four elements in the std::array. If there is only one element in the row, then there should be only one element in the std::array So when I run this code I get the following output:-

ASD BSD CSdsa   ood 
fmads   aok pdski       
kdijf   okmdsomf    opkasd  okd 
asdas       opkasd  okd 
kamkd   aoda    kked    ok  

So, the fourth row has a wrong std::array since it should only have one element, but instead it should have only one. How can I achieve this?

Also, I think the probable problem is in the while loop which begins at line 12 of the code.