#include<bits/stdc++.h>
// #include<atcoder/all>
// #include<boost/multiprecision/cpp_int.hpp>

using namespace std;
// using namespace atcoder;
// using bint = boost::multiprecision::cpp_int;
using ll = long long;
using ull = unsigned long long;
using ld = long double;
using P = pair<ll,ll>;
using vi = vector<ll>;
using vvi = vector<vi>;
using vvvi = vector<vvi>;
using ve = vector<vector<int>>;
using vb = vector<bool>;
using vvb = vector<vb>;
#define rep(i,s,n) for(ll i = (ll)s;i < (ll)n;i++)
#define rrep(i,l,r) for(ll i = r-1;i >= l;i--)
#define ALL(x) (x).begin(),(x).end()
#define sz(c) ((ll)(c).size())
#define LB(A,x) (int)(lower_bound(A.begin(),A.end(),x)-A.begin())
#define UB(A,x) (int)(upper_bound(A.begin(),A.end(),x)-A.begin())
// #define MOD 1000000007
#define MOD 998244353
template<typename T>using min_priority_queue=priority_queue<T,vector<T>,greater<T>>;
template<typename T>ostream&operator<<(ostream&os,vector<T>&v){for(int i = 0;i < v.size();i++)os<<v[i]<<(i+1!=v.size()?" ":"");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.first<<" "<<p.second;return os;}
template<typename T1,typename T2>istream&operator>>(istream&is,pair<T1,T2>&p){is>>p.first>>p.second;return is;}
template<typename T> inline bool chmax(T &a,T b){if(a < b){a = b;return true;}return false;}
template<typename T> inline bool chmin(T &a,T b){if(a > b){a = b;return true;}return false;}
ld dist(ld x1,ld y1,ld x2, ld y2){return sqrtl((x1-x2)*(x1-x2)+(y1-y2)*(y1-y2));}


int main(){
  
  ios_base::sync_with_stdio(0), cin.tie(0);
  // {OX,OY} = {1,1},{-1,1}
  auto calc = [](string &s,int OX,int OY)->int{
    int res = 0;
    int x = 0,y = 0;
    rep(i,0,sz(s)){
      int nx = x,ny = y;
      if(s[i] == 'U')ny+= 2;
      else if(s[i] == 'D')ny-= 2;
      else if(s[i] == 'L')nx -= 2;
      else nx += 2;
      if(x < OX && y > OY && nx < OX && ny < OY)res++;
      if(x < OX && y < OY && nx < OX && ny > OY)res--;
      swap(x,nx);swap(y,ny);
    }
    return res;
  };
  int res = 0;
  int n,m;cin >> n >> m;
  rep(i,0,n){
    string s;cin >> s;
    int a = calc(s,1,1),b = calc(s,-1,1);
    if(a == 0 && b == 0)res++;
    // cout << a << " " << b << " a\n";
  }
  cout << res << "\n";
  

  return 0;
}