#include <bits/stdc++.h>
#include "scrivener.h"

#define pb push_back

using namespace std;

string s;
vector < string > v;

void Init () {
    v.pb("");
}

void TypeLetter (char L) {
    v.pb(v.back() + L);
}

void UndoCommands (int U) {
    v.pb(v[max(0, (int)v.size() - U - 1)]);
}

char GetLetter (int P) {
  return s[P];
  //return 'a';
}