/**
	author:  shobonvip
	created: 2025.02.21 23:09:39
**/

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

//* ATCODER
#include<atcoder/all>
using namespace atcoder;
typedef modint998244353 mint;
//*/

/* BOOST MULTIPRECISION
#include<boost/multiprecision/cpp_int.hpp>
using namespace boost::multiprecision;
//*/

typedef long long ll;

#define rep(i, s, n) for (int i = (int)(s); i < (int)(n); i++)
#define rrep(i, s, n) for (int i = (int)(n)-1; i >= (int)(s); i--)
#define all(v) v.begin(), v.end()

template <typename T> bool chmin(T &a, const T &b) {
	if (a <= b) return false;
	a = b;
	return true;
}

template <typename T> bool chmax(T &a, const T &b) {
	if (a >= b) return false;
	a = b;
	return true;
}

template <typename T> T max(vector<T> &a){
	assert(!a.empty());
	T ret = a[0];
	for (int i=0; i<(int)a.size(); i++) chmax(ret, a[i]);
	return ret;
}

template <typename T> T min(vector<T> &a){
	assert(!a.empty());
	T ret = a[0];
	for (int i=0; i<(int)a.size(); i++) chmin(ret, a[i]);
	return ret;
}

template <typename T> T sum(vector<T> &a){
	T ret = 0;
	for (int i=0; i<(int)a.size(); i++) ret += a[i];
	return ret;
}

int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);

	
	int n, m; cin >> n >> m;
	auto check = [&](string s) -> bool {
		int x = 0;
		int y = 0;
		vector<int> r;
		rep(i,0,m) {
			if (s[i] == 'L') {
				if (x == 1) {
					if (y >= 1) {
						r.push_back(0);
					}else{
						r.push_back(1);
					}
				}
				if (x == 0) {
					if (y >= 1) {
						r.push_back(2);
					}else{
						r.push_back(3);
					}
				}
				x--;
			}else if(s[i] == 'R') {
				x++;
			}else if(s[i] == 'U') {
				y++;
			}else if(s[i] == 'D') {
				y--;
			}
		}
		vector<int> st;
		rep(i,0,(int)r.size()) {
			if (!st.empty()) {
				if ((r[i] ^ 1) == st.back()) {
					st.pop_back();
					continue;
				}
			}
			st.push_back(r[i]);
		}
		return st.empty();
	};
	int ans = 0;
	rep(i,0,n) {
		string s; cin >> s;
		if (!check(s)) continue;
		ans++;
	}
	cout << ans << '\n';
}