//#define NDEBUG
#pragma warning(disable : 4146)

#include <bits/stdc++.h>

namespace n91 {

  using i32 = std::int32_t;
  using i64 = std::int64_t;
  using u32 = std::uint32_t;
  using u64 = std::uint64_t;
  using isize = std::ptrdiff_t;
  using usize = std::size_t;
  using f64 = double;

  struct rep {
    struct itr {
      usize i;
      constexpr itr(const usize i) noexcept : i(i) {}
      void operator++() noexcept { ++i; }
      constexpr usize operator*() const noexcept { return i; }
      constexpr bool operator!=(const itr x) const noexcept { return i != x.i; }
    };
    const itr f, l;
    constexpr rep(const usize f, const usize l) noexcept
      : f(std::min(f, l)), l(l) {}
    constexpr auto begin() const noexcept { return f; }
    constexpr auto end() const noexcept { return l; }
  };
  struct revrep {
    struct itr {
      usize i;
      constexpr itr(const usize i) noexcept : i(i) {}
      void operator++() noexcept { --i; }
      constexpr usize operator*() const noexcept { return i; }
      constexpr bool operator!=(const itr x) const noexcept { return i != x.i; }
    };
    const itr f, l;
    constexpr revrep(const usize f, const usize l) noexcept
      : f(l - 1), l(std::min(f, l) - 1) {}
    constexpr auto begin() const noexcept { return f; }
    constexpr auto end() const noexcept { return l; }
  };
  template <class T> auto md_vec(const usize n, const T& value) {
    return std::vector<T>(n, value);
  }
  template <class... Args> auto md_vec(const usize n, Args... args) {
    return std::vector<decltype(md_vec(args...))>(n, md_vec(args...));
  }
  template <class T> constexpr T difference(const T& a, const T& b) noexcept {
    return a < b ? b - a : a - b;
  }
  template <class T> void chmin(T& a, const T& b) noexcept {
    if (b < a)
      a = b;
  }
  template <class T> void chmax(T& a, const T& b) noexcept {
    if (a < b)
      a = b;
  }
  template <class F> class rec_lambda {
    F f;

  public:
    rec_lambda(F&& f_) : f(std::forward<F>(f_)) {}
    template <class... Args> auto operator()(Args &&... args) const {
      return f(*this, std::forward<Args>(args)...);
    }
  };
  template <class T> T scan() {
    T ret;
    std::cin >> ret;
    return ret;
  }
  constexpr char eoln = '\n';

  i64 floor_div(const i64 n, const i64 d) {
    assert(d != 0);
    return n / d - static_cast<i64>((n ^ d) < 0 && n % d != 0);
  }

  i64 ceil_div(const i64 n, const i64 d) {
    assert(d != 0);
    return n / d + static_cast<i64>((n ^ d) >= 0 && n % d != 0);
  }

#ifdef N91_LOCAL
#define OJ_LOCAL(a, b) b
#else
#define OJ_LOCAL(a, b) a
#endif

} // namespace n91

#include <atcoder/modint>

using mint = atcoder::modint998244353;

namespace n91 {

  void solve() {
    const u32 a = scan<u32>();
    const u32 b = scan<u32>();
    const usize k = scan<usize>();
    struct w_t {
      u32 x, y;
      char d;
    };
    std::vector<w_t> ws(k);
    for (auto& [x, y, d] : ws) {
      std::cin >> x >> y >> d;
    }

    mint ans = 0;
    const u32 g = std::gcd(a, b);

    [&]() {
      std::map<u32, char> mp;
      for (const auto& [x, y, d] : ws) {
        if (d == 'U' || d == 'D')
          return;
        if (mp.count(y)) {
          if (mp[y] != d)
            return;
        }
        mp[y] = d;
      }
      ans += mint(2).pow(b - mp.size());
    }();
    [&]() {
      std::map<u32, char> mp;
      for (const auto& [x, y, d] : ws) {
        if (d == 'L' || d == 'R')
          return;
        if (mp.count(x)) {
          if (mp[x] != d)
            return;
        }
        mp[x] = d;
      }
      ans += mint(2).pow(a - mp.size());
    }();

    [&]() {
      std::map<u32, char> mp;
      for (const auto& [x, y, d] : ws) {
        if (d == 'L' || d == 'D')
          return;
        const u32 key = (x + y) % g;
        if (mp.count(key)) {
          if (mp[key] != d)
            return;
        }
        mp[key] = d;
      }
      ans += mint(2).pow(g - mp.size());
    }();
    [&]() {
      std::map<u32, char> mp;
      for (const auto& [x, y, d] : ws) {
        if (d == 'R' || d == 'U')
          return;
        const u32 key = (x + y) % g;
        if (mp.count(key)) {
          if (mp[key] != d)
            return;
        }
        mp[key] = d;
      }
      ans += mint(2).pow(g - mp.size());
    }();

    [&]() {
      std::map<u32, char> mp;
      for (const auto& [x, y, d] : ws) {
        if (d == 'L' || d == 'U')
          return;
        const u32 key = (x + b - y) % g;
        if (mp.count(key)) {
          if (mp[key] != d)
            return;
        }
        mp[key] = d;
      }
      ans += mint(2).pow(g - mp.size());
    }();
    [&]() {
      std::map<u32, char> mp;
      for (const auto& [x, y, d] : ws) {
        if (d == 'R' || d == 'D')
          return;
        const u32 key = (x + b - y) % g;
        if (mp.count(key)) {
          if (mp[key] != d)
            return;
        }
        mp[key] = d;
      }
      ans += mint(2).pow(g - mp.size());
    }();

    for (const char c : {'L', 'R', 'D', 'U'}) {
      bool ok = true;
      for (const auto& [x, y, d] : ws)
        if (d != c)
          ok = false;
      if (ok) {
        ans -= 2;
      }
    }

    if (g % 2 == 0) {
      [&]() {
        std::map<u32, char> mp0, mp1;
        for (const auto& [x, y, d] : ws) {
          if ((x + y) % 2 == 0) {
            if (d == 'U' || d == 'D')
              return;
            if (mp0.count(y) && mp0[y] != d)
              return;
            mp0[y] = d;
          }
          else {
            if (d == 'L' || d == 'R')
              return;
            if (mp1.count(x) && mp1[x] != d)
              return;
            mp1[x] = d;
          }
        }
        ans += mint(2).pow(b - mp0.size()) * mint(2).pow(a - mp1.size());
        std::set<char> st;
        for (const auto& [x, y, d] : ws)
          st.insert(d);
        for (const char x : {'U', 'D'}) {
          for (const char y : {'L', 'R'}) {
            if (!st.count(x) && !st.count(y))
              ans -= 1;
          }
        }
      }();

      [&]() {
        std::map<u32, char> mp0, mp1;
        for (const auto& [x, y, d] : ws) {
          if ((x + y) % 2 == 1) {
            if (d == 'U' || d == 'D')
              return;
            if (mp0.count(y) && mp0[y] != d)
              return;
            mp0[y] = d;
          }
          else {
            if (d == 'L' || d == 'R')
              return;
            if (mp1.count(x) && mp1[x] != d)
              return;
            mp1[x] = d;
          }
        }
        ans += mint(2).pow(b - mp0.size()) * mint(2).pow(a - mp1.size());
        std::set<char> st;
        for (const auto& [x, y, d] : ws)
          st.insert(d);
        for (const char x : {'U', 'D'}) {
          for (const char y : {'L', 'R'}) {
            if (!st.count(x) && !st.count(y))
              ans -= 1;
          }
        }
      }();
    }
    std::cout << ans.val() << eoln;
  }

  void main_() {
    const usize t = scan<usize>();
    for (const usize i : rep(0, t))
      solve();
  }

} // namespace n91

int main() {
  //*
  std::ios::sync_with_stdio(false);
  std::cin.tie(nullptr);
  //*/
  std::cout << std::fixed << std::setprecision(20);
  n91::main_();
  return 0;
}