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

using namespace std;

char buf[256];
string istr(int i) {sprintf(buf,"%d",i); return buf;}
string dstr(double d) {sprintf(buf,"%f",d); return buf;}
int ival(string i) {return atoi(i.c_str());}
double dval(string d) {return(double)atof(d.c_str());}

vector<string> stoken(string data, string space) {
  vector<string> ret;
  string t="";
  data+=space[0];
  for(int i=0;i<data.length();i++) {
    if(space.find(data[i],0)==string::npos)t+=data[i];
    else if(t.size()!=0){ret.push_back(t); t="";}
  }
  return ret;
}

vector<vector<string> > sstoken(vector<string> data, string space) {
  vector<vector<string> > ret;
  for(int i=0;i<data.size();i++)ret.push_back(stoken(data[i],space));
  return ret;
}

vector<int> itoken(string data, string space) {
  vector<int> ret;
  vector<string> t=stoken(data, space);
  for(int i=0;i<t.size();i++)ret.push_back(atoi(t[i].c_str()));
  return ret;
}

vector<vector<int> > iitoken(vector<string> data, string space) {
  vector<vector<int> > ret;
  for(int i=0;i<data.size();i++)ret.push_back(itoken(data[i],space));
  return ret;
}

vector<double> dtoken(string data, string space) {
  vector<double> ret;
  vector<string> t=stoken(data, space);
  for(int i=0;i<t.size();i++)ret.push_back(atof(t[i].c_str()));
  return ret;
}

vector<vector<double> > ddtoken(vector<string> data, string space) {
  vector<vector<double> > ret;
  for(int i=0;i<data.size();i++)ret.push_back(dtoken(data[i],space));
  return ret;
}

int main() {
  return 0;
}