import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.util.StringTokenizer;


public class WritingCode {
	static int N,M,B,MOD;
	static int arr[] = new int[502];
	static int dp[][][] = new int[2][502][502];

	public static void main(String[]args) throws Throwable{
		IReader in = new IReader(System.in);
		N = in.i();
		M = in.i();
		B = in.i();
		MOD = in.i();
		for(int i=1;i<=N;i++) arr[i] = in.i();
	dp[0][0][0] = 1;



		for(int i=1;i<=N;i++){
		  
			dp[(i)&1][0][0] =1;
			for(int j=1;j<=M;j++){

				for(int k=0;k<=B;k++){

					dp[i&1][j][k] += dp[(i-1)&1][j][k]%MOD; 
					if(k-arr[i]>=0) dp[(i)&1][j][k] += (dp[(i)&1][j-1][k-arr[i]])%MOD; 
				}
			}
		}
		long sum = 0;
		for(int k=0;k<=B;k++) sum+= dp[N&1][M][k]%MOD;
		System.out.print(sum);
	}
}


class IReader {
	public BufferedReader reader;
	public StringTokenizer tokenizer;

	public IReader(InputStream stream) {
		reader = new BufferedReader(new InputStreamReader(stream), 32768);
		tokenizer = null;
	}

	public String next() {
		while (tokenizer == null || !tokenizer.hasMoreTokens()) {
			try {
				tokenizer = new StringTokenizer(reader.readLine());
			} catch (IOException e) {
				throw new RuntimeException(e);
			}
		}
		return tokenizer.nextToken();
	}

	public int i() {
		return Integer.parseInt(next());
	}

}