#include <bits/stdc++.h>
using namespace std;

#define fs first
#define sc second
#define pb emplace_back
#define mp make_pair
#define all(v) v.begin(), v.end()
#define rall(v) v.rbegin(), v.rend()

const int32_t inf = 1001001001;
const int64_t infll = 1001001001001001001ll;
const int dx[] = {0, -1, 1, 0, -1, 1, -1, 1}, dy[] = {-1, 0, 0, 1, -1, -1, 1, 1};

template <typename T> using vector2d = vector<vector<T>>;

// clang-format off
template <typename T> void sort(vector<T> &v) { sort(all(v)); }
// ostream &operator<<(ostream &os, __int128_t value) { if (ostream::sentry(os)) { __uint128_t tmp = value < 0 ? -value : value; char buffer[64]; char *d = end(buffer); do { --d; *d = "0123456789"[tmp % 10]; tmp /= 10; } while (tmp != 0); if (value < 0) { --d; *d = '-'; } int len = end(buffer) - d; if (os.rdbuf()->sputn(d, len) != len) { os.setstate(ios_base::badbit); }} return os; }
// istream &operator>>(istream &is, __int128_t &value) { string in; is >> in; value = 0; for (const char &c : in) { if ('0' <= c && c <= '9') value = 10 * value + (c - '0'); } if (in[0] == '-') value *= -1; return is; }
// ostream &operator<<(ostream &os, __uint128_t value) { if (ostream::sentry(os)) { char buffer[64]; char *d = end(buffer); do { --d; *d = "0123456789"[value % 10]; value /= 10; } while (value != 0); int len = end(buffer) - d; if (os.rdbuf()->sputn(d, len) != len) { os.setstate(ios_base::badbit); }} return os; }
// istream &operator>>(istream &is, __uint128_t &value) { string in; is >> in; value = 0; for (const char &c : in) { if ('0' <= c && c <= '9') value = 10 * value + (c - '0'); } return is; }
template <typename T> ostream &operator<<(ostream &os, vector<T> &v) { os << v[0]; for (int i = 1; i < v.size(); ++i) os << " " << v[i]; return os; }
template <typename T> istream &operator>>(istream &is, vector<T> &v) { for (T &in : v) is >> in; return is; }
template <typename T1, typename T2> ostream &operator<<(ostream &os, pair<T1, T2> p) { os << p.fs << " " << p.sc; return os; }
template <typename T1, typename T2> istream &operator>>(istream &is, pair<T1, T2> &p) { is >> p.fs >> p.sc; return is; }

struct IoSetup { IoSetup(){ cin.tie(0); ios::sync_with_stdio(0); cout << fixed << setprecision(10); cerr << fixed << setprecision(10); } } iosetup;

inline int64_t in() { int64_t x = 0; cin >> x; return x; }
template <typename T1, typename T2> inline bool chmax(T1 &a, T2 b) { return a < b && (a = b, true); }
template <typename T1, typename T2> inline bool chmin(T1 &a, T2 b) { return a > b && (a = b, true); }
// clang-format on

void debug(char c, int x, int y, int l, int r) {
  cout << c << " (" << x << ", " << y << ") = [" << l << ", " << r << ")" << endl;
}

signed main(int argc, char *argv[]) {
  int n = in(), k = in();

  vector<int> x(n), y(n);
  vector<char> c(n);
  for (int i = 0; i < n; ++i) {
    cin >> x[i] >> y[i] >> c[i];
  }

  int ans = 0;
  for (int i = 0; i < k; ++i) {
    vector<int> imos(4 * k, 0);

    // for (int j = 0; j < 20; ++j) {
    //   cerr << (((j - i + k) / k) & 1);
    // }
    // cerr << endl;

    for (int j = 0; j < n; ++j) {
      int latte = ((x[j] - i + 2 * k) / k) & 1, malta = (c[j] == 'W');
      int t = y[j] % (2 * k);
      if (latte == malta) {
        if (i == 1) {
          // cout << "u : ", debug(c[j], x[j], y[j], t + 1, t + k + 1);
        }
        imos[t + 1]++;
        imos[t + k + 1]--;
      } else {
        if (i == 1) {
          // cout << "d : ", debug(c[j], x[j], y[j], t + k + 1, t + 2 * k + 1);
        }
        imos[t + k + 1]++;
        imos[t + 2 * k + 1]--;
      }
    }

    for (int j = 1; j < imos.size(); ++j) {
      imos[j] += imos[j - 1];
    }
    for (int i = 0; i < 2 * k; ++i) {
      imos[i] += imos[i + 2 * k];
    }
    // cout << imos << endl;

    chmax(ans, *max_element(all(imos)));
    // if (chmax(ans, *max_element(all(imos)))) {
    //   cout << i << " " << ans << endl;
    // }
  }

  cout << ans << endl;
}


Measured memory_bytes: 1280