#include<bits/stdc++.h>
using namespace std;
#define rep(i,a,b) for(int i=(a);i<(b);i++)
#define all(a) begin(a),end(a)
#define sz(a) (int)(a).size()
typedef long long ll;
typedef vector<int> vi;
typedef pair<int,int> pii;
const ll mod=998244353;
int main(){
	cin.tie(0)->sync_with_stdio(0);
	cin.exceptions(cin.failbit);
	int N,M;cin>>N>>M;
	int ans=0;
	while(N--){
		string S;cin>>S;
		ll a1=0,a2=0,x=0,y=0;
		rep(i,0,sz(S)){
			ll _x=x,_y=y;
			if(S[i]=='L')x--;
			else if(S[i]=='R')x++;
			else if(S[i]=='U')y++;
			else y--;
			a1+=(2*_x-1)*(2*y-1)-(2*x-1)*(2*_y-1);
			a2+=(2*_x+1)*(2*y-1)-(2*x+1)*(2*_y-1);
		}
		if(a1==0&&a2==0)ans++;
	}
	cout<<ans<<endl;
}