#include <bits/stdc++.h>
using namespace std;
void Yes(){cout << "YES\n";}
void No(){cout << "NO\n";}

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

    int T; cin >> T;
    int answer = 0,N; cin >> N;
    while(T--){
        string s; cin >> s;
        {
            string t = "";
            for(auto c : s){
                if(t.size()){
                    if(t.back() == c) t.pop_back();
                    else t += c;
                }
                else t += c;
            }
        }
        int x = 0,y = 0;
        set<int> c1L,c2L,c1R,c2R;
        for(auto c : s){
            if(c == 'L' && y > 0){
                if(x == 1) c2L.insert(y);
                if(x == 0) c1L.insert(y); 
            }
            if(c == 'R' && y > 0){
                if(x == -1) c1R.insert(y);
                if(x == 0) c2R.insert(y);
            }
            if(c == 'L') x--;
            else if(c == 'R') x++;
            else if(c == 'U') y++;
            else y--;
        }
        int c1 = c1L.size()+c1R.size(),c2 = c2L.size()+c2R.size();
        if(c1%2 == 0 && c2%2 == 0) answer++;
    }   
    cout << answer << endl;
}