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#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
using std::string;
using std::vector;
using std::cin;
struct Query {
string type, s;
size_t ind;
};
class QueryProcessor {
int bucket_count;
// store all strings in one vector
vector<vector<string>> elems;
size_t hash_func(const string& s) const {
static const size_t multiplier = 263;
static const size_t prime = 1000000007;
unsigned long long hash = 0;
for (int i = static_cast<int> (s.size()) - 1; i >= 0; --i)
hash = (hash * multiplier + s[i]) % prime;
return hash % bucket_count;
}
public:
explicit QueryProcessor(int bucket_count): bucket_count(bucket_count) {
elems.reserve(bucket_count);
}
Query readQuery() const {
Query query;
cin >> query.type;
if (query.type != "check")
cin >> query.s;
else
cin >> query.ind;
return query;
}
void writeSearchResult(bool was_found) const {
std::cout << (was_found ? "yes\n" : "no\n");
}
void processQuery(const Query& query) {
if (query.type == "check") {
// use reverse order, because we append strings to the end
vector<string> *list = &elems[query.ind];
for (int i = static_cast<int>(list->size()) - 1; i >= 0; --i)
std::cout << (*list)[i] << " ";
std::cout << "\n";
} else {
size_t h = hash_func(query.s);
vector<string> *list = &elems[h];
vector<string>::iterator it = std::find(list->begin(), list->end(), query.s);
if (query.type == "find")
writeSearchResult(it != list->end());
else if (query.type == "add") {
if (it == list->end())
list->push_back(query.s);
} else if (query.type == "del") {
if (it != list->end())
list->erase(it);
}
}
}
void processQueries() {
int n;
cin >> n;
for (int i = 0; i < n; ++i)
processQuery(readQuery());
}
};
int main() {
std::ios_base::sync_with_stdio(false);
int bucket_count;
cin >> bucket_count;
QueryProcessor proc(bucket_count);
proc.processQueries();
return 0;
}
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