#include <iostream>
#include <vector>
#include <string>

using namespace std;

std::vector<std::string> split(const std::string&, const std::string&);
std::vector<std::string> split(const char*, const char*);
std::vector<std::string> split(const std::string&, const char*);
std::vector<std::string> split(const char*, std::string&);