import java.io.*;
import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        int n = sc.nextInt();
        int a = sc.nextInt();
        int b = sc.nextInt();
        int c = sc.nextInt();
        int[] sums = new int[n + 1];
        for (int i = 1; i <= n; i++) {
            sums[i] = sums[i - 1];
            sums[i] += sc.next().length();
        }
        int x = n;
        int y = n;
        int z = n;
        int ans = 0;
        for (int i = n; i >= 0 && x >= 0 && y >= 0 && z >= 0; i--) {
            while (z >= 0 && sums[i] - sums[z] < c) {
                z--;
            }
            if (z < 0 || sums[i] - sums[z] > c) {
                continue;
            }
            while (y >= 0 && sums[z] - sums[y] < b) {
                y--;
            }
            if (y < 0 || sums[z] - sums[y] > b) {
                continue;
            }
            while (x >= 0 && sums[y] - sums[x] < a) {
                x--;
            }
            if (x < 0 || sums[y] - sums[x] > a) {
                continue;
            }
            ans++;
        }
        System.out.println(ans);
    }
}
class Scanner {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    StringTokenizer st = new StringTokenizer("");
    
    public Scanner() throws Exception {
        
    }
    
    public int nextInt() throws Exception {
        return Integer.parseInt(next());
    }
    
    public long nextLong() throws Exception {
        return Long.parseLong(next());
    }
    
    public String next() throws Exception {
        if (!st.hasMoreTokens()) {
            st = new StringTokenizer(br.readLine());
        }
        return st.nextToken();
    }
}