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

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner sc = new Scanner();
        int n = sc.nextInt();
        int[] counts = new int[10];
        for (char c : sc.next().toCharArray()) {
            counts[c - '0']++;
        }
        HashSet<Integer> ans = new HashSet<>();
        for (int i = 1; i < 10; i++) {
            if (counts[i] == 0) {
                continue;
            }
            counts[i]--;
            for (int j = 1; j < 10; j++) {
                if (counts[j] == 0) {
                    continue;
                }
                counts[j]--;
                for (int k = 1; k < 10; k++) {
                    if (counts[k] > 0) {
                        ans.add((i * 100 + j * 10 + k) % 40);
                    }
                }
                counts[j]++;
            }
            counts[i]++;
        }
        System.out.println(ans.size());
    }
}
class Utilities {
    static String arrayToLineString(Object[] arr) {
        return Arrays.stream(arr).map(x -> x.toString()).collect(Collectors.joining("\n"));
    }
    
    static String arrayToLineString(int[] arr) {
        return String.join("\n", Arrays.stream(arr).mapToObj(String::valueOf).toArray(String[]::new));
    }
}
class Scanner {
    BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
    StringTokenizer st = new StringTokenizer("");
    StringBuilder sb = new StringBuilder();
    
    public Scanner() throws Exception {
        
    }
    
    public int nextInt() throws Exception {
        return Integer.parseInt(next());
    }
    
    public long nextLong() throws Exception {
        return Long.parseLong(next());
    }
    
    public double nextDouble() throws Exception {
        return Double.parseDouble(next());
    }
    
    public int[] nextIntArray() throws Exception {
        return Stream.of(br.readLine().split(" ")).mapToInt(Integer::parseInt).toArray();
    }
    
    public String next() throws Exception {
        while (!st.hasMoreTokens()) {
            st = new StringTokenizer(br.readLine());
        }
        return st.nextToken();
    }
    
}