package main

import (
	"bufio"
	"fmt"
	"os"
	"sort"
	"strconv"
)

const (
	m = 1000000007
)

var (
	N int
	K int
	A []int
)

func f(i, scores, peoples int) int {
	result := 0
	for j := i; j < N; j++ {
		if (scores+A[j])/(peoples+1) < K {
			break
		}
		result++
		result += f(j+1, scores+A[j], peoples+1)
		result %= m
	}
	return result
}

func main() {
	defer flush()

	N = readInt()
	K = readInt()
	A = make([]int, N)
	for i := 0; i < N; i++ {
		A[i] = readInt()
	}

	sort.Sort(sort.Reverse(sort.IntSlice(A)))
	println(f(0, 0, 0))
}

const (
	ioBufferSize = 1 * 1024 * 1024 // 1 MB
)

var stdinScanner = func() *bufio.Scanner {
	result := bufio.NewScanner(os.Stdin)
	result.Buffer(make([]byte, ioBufferSize), ioBufferSize)
	result.Split(bufio.ScanWords)
	return result
}()

func readString() string {
	stdinScanner.Scan()
	return stdinScanner.Text()
}

func readInt() int {
	result, err := strconv.Atoi(readString())
	if err != nil {
		panic(err)
	}
	return result
}

var stdoutWriter = bufio.NewWriter(os.Stdout)

func flush() {
	stdoutWriter.Flush()
}

func println(args ...interface{}) (int, error) {
	return fmt.Fprintln(stdoutWriter, args...)
}