#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
#define IOS ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define fp(a,i,c) for(int (a) = (i); (a) < (c); (a)++)
#define fpp(a,i,c) for(int (a) = (i); (a) <= (c); (a)++)
#define fv(a, c) for(int (a) = (1); (a) <= (c); (a)++)
#define fz(a, c) for(int (a) = (0); (a) < (c); (a)++)
#define fm(a,i,c) for(int (a) = (i); (a) > (c); (a)--)
#define fmm(a,i,c) for(int (a) = (i); (a) >= (c); (a)--)
#define pb push_back
#define in insert
#define ss second
#define ff first
#define vi vector <int>
#define fa(a, v) for(auto (a) : (v))
#define mnel(a) *min_element(all(a))
#define mxel(a) *max_element(all(a))
#define si set<int>
#define sov(a) sort(all((a)))
#define maxx 1000100
char last;
vector <string> now(5555);
int cnt = 1;
//vector <pair<int, string>> done;
void Init() {
}
void TypeLetter(char L) {
now[cnt+1] = now[cnt] + L;
cnt ++;
}
void UndoCommands(int U) {
cnt ++;
now[cnt] = now[cnt-U-1];
}
char GetLetter(int P) {
return now[cnt][P];
}
