int readTax(string, map<string, string>&);
int readNames(string, map<string, string>&, map<string, int>&);
int readNames(string, map<string, string>&);
int readTax(string, map<string, string>&);
int readNames(string, map<string, string>&, map<string, int>&);
int readNames(string, map<string, string>&);