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#include <string>
#include <stdexcept>

using namespace std;

vector<string> Split(const string& str, const string& delim = " ") {
    vector<string> answer;
    int begword = 0;
    int endword = 0;
    while(str.find(delim, endword) != str.npos)
    {
        begword = str.find(delim, endword);
        if(str.find(delim, begword) == str.npos)
        {
            int sz = str.size();
            endword = sz;
        }
        else
            endword = str.find(delim, begword);
        answer.push_back(str.substr(begword, endword - begword));
        endword--;
    }
    return answer;
    throw std::runtime_error("Not implemented");
}