#ifndef LOCAL
#pragma GCC optimize ("O3")
#pragma GCC optimize ("unroll-loops")
#pragma GCC target ("avx")
#endif

#include <vector>
#include <set>
#include <map>
#include <tuple>
#include <queue>
#include <stack>
#include <bitset>
#include <functional>
#include <algorithm>
#include <utility>
#include <numeric>
#include <iostream>
#include <cmath>
#include <cassert>
#include <cstring>

using namespace std;

using ll = long long;
using ull = unsigned long long;
using VI = vector<int>;
using VVI = vector<vector<int>>;
using VLL = vector<ll>;
using VVLL = vector<vector<ll>>;
using VB = vector<bool>;
using PII = pair<int, int>;
using PLL = pair<ll, ll>;
template <typename T>
using minheap = priority_queue<T, vector<T>, greater<T>>;
const int INF = 1000000007;
const ll INF_LL = 1'000'000'000'000'000'007;

#define __overload3(_1, _2, _3, name,...) name
#define rep(...) __overload3(__VA_ARGS__, repFromUntil, repUntil, repeat)(__VA_ARGS__)
#define repeat(times) repFromUntil(_name##__LINE__, 0, times)
#define repUntil(name, times) repFromUntil(name, 0, times)
#define repFromUntil(name, from, until) for (int name = from, name##__until = (until); name < name##__until; name++)
#define repr(...) __overload3(__VA_ARGS__, reprFromUntil, reprUntil, repeat)(__VA_ARGS__)
#define reprUntil(name, times) reprFromUntil(name, 0, times)
#define reprFromUntil(name, from, until) for (int name = (until) - 1, name##__from = (from); name >= name##__from; name--)

#define EXIT(out) do { OUT(out); exit(0); } while (0)

#define all(x) begin(x), end(x)
#define rall(x) rbegin(x), rend(x)

#ifdef LOCAL
#define debug(v) do {debugos << "L" << __LINE__ << " " << #v << " > ";debugos<<(v)<<newl;} while (0)
#define debugv(v) do {debugos << "L" << __LINE__ << " " << #v << " > ";for(auto e:(v)){debugos<<e<<" ";}debugos<<newl;} while (0)
#define debuga(m,w) do {debugos << "L" << __LINE__ << " " << #m << " > ";for(int x=0;x<(w);x++){debugos<<(m)[x]<<" ";}debugos<<newl;} while (0)
#define debugaa(m,h,w) do {debugos << "L" << __LINE__ << " " << #m << " > \n";for(int y=0;y<(h);y++){for(int x=0;x<(w);x++){debugos<<(m)[y][x]<<" ";}debugos<<newl;}} while (0)
#else
#define debug(v) do {v;} while (0)
#define debugv(v) do; while (0)
#define debuga(m,w) do; while (0)
#define debugaa(m,h,w) do; while (0)
#endif

#define newl "\n"

template <typename T, typename U> bool chmin(T& var, U x) {
  if (var > x) {
    var = x;
    return true;
  } else return false;
}

template <typename T, typename U> bool chmax(T& var, U x) {
  if (var < x) {
    var = x;
    return true;
  } else return false;
}

template <typename T> int sgn(T val) { return (T(0) < val) - (val < T(0)); }

ll power(ll e, int t, ll mod = INF_LL) {
  ll res = 1;
  while (t) {
    if (t&1) res = (res * e) % mod;
    t >>= 1;
    e = (e * e) % mod;
  }
  return res;
}

template <typename T> T divceil(T m, T d) {
  assert(m >= 0 and d > 0);
  return (m+d-1)/d;
}

template<typename T>
vector<T> make_v(size_t a, T b) { return vector<T>(a, b); }

template<typename... Ts>
auto make_v(size_t a, Ts... ts) {
  return vector<decltype(make_v(ts...))>(a, make_v(ts...));
}

string operator*(const string& s, int times) {
  string res = "";
  rep(times) res += s;
  return res;
}

struct Edge {
  int to; ll cost;
  Edge(int _to): to(_to), cost(1) {}
  Edge(int _to, ll _cost): to(_to), cost(_cost) {}
  operator int() { return to; }
};

using Graph = vector<vector<Edge>>;

class MyScanner {
public:
  int offset = 0;
  char nc(){
#ifdef LOCAL
    return getchar();
#else
    return getchar_unlocked();
#endif
  }
  template <typename T> void input_integer(T& var) {
    var = 0; T sign = 1;
    int cc = nc();
    for (; cc<'0' || '9'<cc; cc = nc())
      if (cc == '-') sign = -1;
    for (; '0' <= cc && cc <= '9'; cc = nc())
      var = (var << 3) + (var << 1) + cc - '0';
    var = var * sign; var += offset;
  }
  int c() { char c; while (c = nc(), c == ' ' or c == '\n'); return c; }
  MyScanner& operator>>(char& var) { var = c(); return *this; }
  MyScanner& operator>>(int& var) { input_integer<int>(var); return *this; }
  MyScanner& operator>>(ll& var) { input_integer<ll>(var); return *this; }
  MyScanner& operator>>(string& var) {
    var = ""; int cc = nc();
    for (; !isvisiblechar(cc); cc = nc());
    for (; isvisiblechar(cc); cc = nc())
      var.push_back(cc);
    return *this;
  }
  template <typename T>
  operator T() { T x; *this >> x; return x; }
  template <typename T>
  void operator()(T &t) { *this >> t; }
  template <typename T, typename... Ts>
  void operator()(T &t, Ts &...ts) { *this >> t; this->operator()(ts...); }
  template <typename Iter>
  void iter(Iter first, Iter last) { while (first != last) *this >> *first, first++; }
  VI vi(int n) { VI res(n); iter(all(res)); return res; }
  VVI vvi(int n, int m) { VVI res(n); rep(i, n) res[i] = vi(m); return res; }
  VLL vll(int n) { VLL res(n); iter(all(res)); return res; }
  VVLL vvll(int n, int m) { VVLL res(n); rep(i, n) res[i] = vll(m); return res; }
  template <typename T>
  vector<T> v(int n) { vector<T> res(n); iter(all(res)); return res; }
private:
  int isvisiblechar(int c) { return 0x21 <= c && c <= 0x7E; }
} IN, IN1{-1};

class MyPrinter {
public:
  int offset = 0;
  template <typename T>
  void output_integer(T var) {
    var += offset;
    if (var == 0) { putchar('0'); return; }
    if (var < 0) putchar('-'), var = -var;
    char stack[32]; int stack_p = 0;
    while (var) stack[stack_p++] = '0' + (var % 10), var /= 10;
    while (stack_p) putchar(stack[--stack_p]);
  }
  MyPrinter& operator<<(char c) { putchar(c); return *this; }
  MyPrinter& operator<<(double x) { printf("%.10f", x); return *this; }
  template <typename T> MyPrinter& operator<<(T var) { output_integer<T>(var); return *this; }
  MyPrinter& operator<<(char* str_p) { while (*str_p) putchar(*(str_p++)); return *this; }
  MyPrinter& operator<<(const char* str_p) { while (*str_p) putchar(*(str_p++)); return *this; }
  MyPrinter& operator<<(const string& str) {
    const char* p = str.c_str();
    const char* l = p + str.size();
    while (p < l) putchar(*p++);
    return *this;
  }
  template <typename T>
  void operator()(T x) { *this << x << newl; }
  template <typename T, typename... Ts>
  void operator()(T x, Ts ...xs) { *this << x << " "; this->operator()(xs...); }
  template <typename Iter>
  void iter(Iter s, Iter t) {
    if (s == t) *this << "\n";
    else for (; s != t; s++) *this << *s << " \n"[next(s, 1) == t];
  }
  template <typename Range>
  void range(const Range& r) { iter(begin(r), end(r)); }
} OUT, OUT1{1};

class DebugPrint {
public:
  template <typename T>
  DebugPrint& operator <<(const T& v) {
#ifdef LOCAL
    cerr << v;
#endif
    return *this;
  }
} debugos;

template <typename OutStream, typename T, typename U>
OutStream& operator<<(OutStream& out, const pair<T, U>& var) {
  return out << var.first << " " << var.second;
}
template <typename OutStream, typename Tuple, size_t I, size_t N,
          enable_if_t<I == N>* = nullptr>
OutStream& tuple_impl(OutStream& out, const Tuple& var) {
  return out;
}
template <typename OutStream, typename Tuple, size_t I, size_t N,
          enable_if_t<I != N>* = nullptr>
OutStream& tuple_impl(OutStream& out, const Tuple& var) {
  out << get<I>(var) << " ";
  return tuple_impl<OutStream, Tuple, I+1, N>(out, var);
}
template <typename OutStream, typename... Ts>
OutStream& operator<<(OutStream& out, const tuple<Ts...>& var) {
  return tuple_impl<OutStream, tuple<Ts...>, 0, sizeof...(Ts)>(out, var);
}
template <typename InStream, typename T, typename U>
InStream& operator>>(InStream& in, pair<T, U>& var) {
  return in >> var.first >> var.second;
}
template <typename InStream, typename Tuple, size_t I, size_t N,
          enable_if_t<I == N>* = nullptr>
InStream& tuple_impl(InStream& in, Tuple& var) {
  return in;
}
template <typename InStream, typename Tuple, size_t I, size_t N,
          enable_if_t<I != N>* = nullptr>
InStream& tuple_impl(InStream& in, Tuple& var) {
  in >> get<I>(var);
  return tuple_impl<InStream, Tuple, I+1, N>(in, var);
}
template <typename InStream, typename... Ts>
InStream& operator>>(InStream& in, tuple<Ts...>& var) {
  return tuple_impl<InStream, tuple<Ts...>, 0, sizeof...(Ts)>(in, var);
}


#pragma GCC diagnostic ignored "-Wshadow"
template <typename T, typename U, typename Merge, typename EMerge, typename Upd>
struct LazySegmentTree {
 private:
  const size_t n, h;
  const T unit;
  const U eunit;
  const Merge merge;
  const EMerge emerge;
  const Upd upd;
  vector<T> data;
  vector<U> lazy;

 public:
  LazySegmentTree(size_t n = 0, T unit = T(), U eunit = U(),
                  Merge merge = Merge(), EMerge emerge = EMerge(),
                  Upd upd = Upd())
      : n(n), h(32 - __builtin_clz(n)), unit(unit), eunit(eunit), merge(merge),
        emerge(emerge), upd(upd), data(n << 1, unit), lazy(n, eunit) {
    build(0, n);
  }

  template <typename Iter,
            enable_if_t<is_same<typename Iter::value_type, T>::value>* = nullptr>
  LazySegmentTree(Iter first, Iter last, size_t n, T unit = T(), U eunit = U(),
                  Merge merge = Merge(), EMerge emerge = EMerge(),
                  Upd upd = Upd())
      : n(n), h(32 - __builtin_clz(n)), unit(unit), eunit(eunit), merge(merge),
        emerge(emerge), upd(upd), data(n << 1, unit), lazy(n, eunit) {
    assign(first, last);
  }

  template <typename Iter,
            enable_if_t<!is_same<typename Iter::value_type, T>::value>* = nullptr>
  LazySegmentTree(Iter first, Iter last, size_t n, T unit = T(),
                                 U eunit = U(), Merge merge = Merge(),
                                 EMerge emerge = EMerge(), Upd upd = Upd())
      : n(n), h(32 - __builtin_clz(n)), unit(unit), eunit(eunit), merge(merge),
        emerge(emerge), upd(upd), data(n << 1, unit), lazy(n, eunit) {
    assign(first, last);
  }

  template <typename Iter>
  LazySegmentTree(Iter first, Iter last, T unit = T(), U eunit = U(),
                  Merge merge = Merge(), EMerge emerge = EMerge(),
                  Upd upd = Upd())
      : LazySegmentTree(first, last, distance(first, last), unit, eunit, merge,
                        emerge, upd) {}

 private:
  void apply(int p, U e, int sz) {
    if (e == eunit) return;
    data[p] = upd(data[p], e, sz);
    if (p < n) {
      if (lazy[p] == eunit) lazy[p] = e;
      else lazy[p] = emerge(lazy[p], e);
    }
  }

  void pushdown(int p, int sz) {
    if (p >= n or lazy[p] == eunit) return;
    apply(p << 1, lazy[p], sz >> 1);
    apply(p << 1 | 1, lazy[p], sz >> 1);
    lazy[p] = eunit;
  }

  void pushup(int p, int sz) {
    if (p >= n) return;
    data[p] = merge(data[p << 1], data[p << 1 | 1]);
    if (lazy[p] != eunit) data[p] = upd(data[p], lazy[p], sz);
  }

  void flush(int l, int r) {
    int s = h, k = 1 << h;
    for (l += n, r += n - 1; s > 0; s--, k >>= 1)
      for (int p = l >> s; p <= r >> s; p++)
        pushdown(p, k);
  }

  void build(int l, int r) {
    int sz = 2;
    for (l += n, r += n - 1; l > 1; sz <<= 1) {
      l >>= 1, r >>= 1;
      for (int p = l; p <= r; p++) pushup(p, sz);
    }
  }

  template <typename Iter>
  void assign(Iter first, Iter last) {
    copy(first, last, data.begin() + n);
    build(0, n);
  }

 public:
  void modify(int l, int r, U e) {
    if (e == eunit) return;
    flush(l, l + 1);
    flush(r - 1, r);
    int l0 = l, r0 = r, k = 1;
    for (l += n, r += n; l < r; l >>= 1, r >>= 1, k <<= 1) {
      if (l & 1) apply(l++, e, k);
      if (r & 1) apply(--r, e, k);
    }
    build(l0, l0 + 1);
    build(r0 - 1, r0);
  }

  T query(int l, int r) {
    flush(l, l + 1);
    flush(r - 1, r);
    T resl = unit, resr = unit;
    for (l += n, r += n; l < r; l >>= 1, r >>= 1) {
      if (l & 1) resl = merge(resl, data[l++]);
      if (r & 1) resr = merge(data[--r], resr);
    }
    return merge(resl, resr);
  }
};
#pragma GCC diagnostic warning "-Wshadow"

#pragma GCC diagnostic ignored "-Wunused-parameter"
struct minT {
  template <typename T>
  T operator()(T a, T b) const { return min(a, b); }
};

struct maxT {
  template <typename T>
  T operator()(T a, T b) const { return max(a, b); }
};

struct assignT {
  template <typename T>
  T operator()(T a, T b, int k = 0) const { return b; }
};
#pragma GCC diagnostic ignored "-Wunused-parameter"

struct plusT {
  template <typename T>
  T operator()(T a, T b, int k) const { return a + b * k; }
};


namespace rolling_hash {

constexpr ull mask30 = (1ULL << 30) - 1;
constexpr ull mask31 = (1ULL << 31) - 1;
constexpr ull MOD = (1ULL << 61) - 1;
int base = rand();
vector<ull> pows{1};

ull mod(ull val) {
  val = (val & MOD) + (val >> 61);
  return val >= MOD ? val - MOD : val;
}

ull mul(ull l, ull r) {
  ull lu = l >> 31, ld = l & mask31;
  ull ru = r >> 31, rd = r & mask31;
  ull middle = ld * ru + lu * rd;
  return ((lu * ru) << 1) + ld * rd + ((middle & mask30) << 31) +
         (middle >> 30);
}

ull mul(ull l, int r) {
  ull lu = l >> 31, ld = l & mask31;
  ull middle = lu * r;
  return ld * r + ((middle & mask30) << 31) + (middle >> 30);
}

void prepare_pows(size_t sz) {
  rep(i, pows.size() - 1, sz - 1) pows.push_back(mod(mul(pows[i], base)));
}

class Calculator {
 private:
  vector<ull> hash;

 public:
  template <typename Iter>
  Calculator(Iter first, Iter last) : hash(last - first + 1) {
    prepare_pows(last - first + 1);
    rep(i, last - first) hash[i + 1] = mod(mul(hash[i], base) + first[i]);
    // assert(hash[i+1] < (1ULL << 62));
  }

 public:
  ull operator()(int l, int r) const {
    static constexpr ull large = MOD * ((1 << 2) - 1);
    return mod(hash[r] + large - mul(hash[l], pows[r - l]));
  }
};

}  // namespace rolling_hash


namespace hash_monoid {

using namespace rolling_hash;

vector<ull> sum_pows{1};

void prepare_sum_pows(size_t sz) {
  prepare_pows(sz);
  rep(i, sum_pows.size() - 1, sz - 1) {
    sum_pows.push_back(mod(sum_pows[i] + pows[i + 1]));
  }
}

// monoid
struct Hash {
  ull value;
  int length;

  Hash() : value(0), length(0) {} // unit
  Hash(ull _value, int _length) : value(_value), length(_length) {}
  Hash(char c, int _length = 1) : value(calc_hash(c, _length)), length(_length) {}

 private:
  ull calc_hash(char c, int _length) {
    prepare_sum_pows(_length);
    return mod(mul(sum_pows[_length - 1], c));
  }

 public:
  operator ull() { return value; }
  bool operator==(const Hash &rhs) {
    return value == rhs.value && length == rhs.length;
  }
  bool operator!=(const Hash &rhs) {
    return value == rhs.value && length == rhs.length;
  }
};


struct mergeT {
  Hash operator()(const Hash &lhs, const Hash &rhs) const {
    prepare_pows(rhs.length+1);
    return Hash(mod(mul(lhs.value, pows[rhs.length]) + rhs.value),
                lhs.length + rhs.length);
  }
};

#pragma GCC diagnostic ignored "-Wunused-parameter"
struct updT {
  Hash operator()(const Hash &lhs, char c, int k = 1) const {
    return Hash(c, k);
  }
};
#pragma GCC diagnostic warning "-Wunused-parameter"

// using HashSegTree = SegmentTree<Hash, mergeT, updT>;
using HashSegTree = LazySegmentTree<Hash, char, mergeT, assignT, updT>;

}  // namespace hash_monoid



int main() {
  int n = IN;
  string u = IN;

  hash_monoid::HashSegTree hash(all(u), n);

  rep(IN) {
    string cmd = IN;
    if (cmd[0] == 's') {
      int x = IN1, y = IN1; string z = IN;
      hash.modify(x, y+1, z[0]);
    } else {
      int a = IN1, b = IN1, c = IN1, d = IN1;
      b++; d++;
      int eq = 0, neq = min(b-a, d-c)+1;
      while (neq - eq > 1) {
        int m = (eq + neq) / 2;
        auto l = hash.query(a, a+m);
        auto r = hash.query(c, c+m);
        (l == r ? eq : neq) = m;
      }
      if (eq == b-a and eq == d-c) OUT("e");
      else if (eq == b-a) OUT("s");
      else if (eq == d-c) OUT("t");
      else {
        auto s = hash.query(a+eq, a+eq+1).value;
        auto t = hash.query(c+eq, c+eq+1).value;
        OUT(s < t ? "s" : "t");
      }
    }
  }
}


Measured memory_bytes: 12620