#include <stdio.h>

#define DIM 70
const int Mod = 1000000007;

void copy_matrix(int d, long long A[][DIM], long long B[][DIM])
{
	int i, j;
	for (i = 0; i < d; i++) for (j = 0; j < d; j++) B[i][j] = A[i][j];
}

void prod_matrix(int d, long long A[][DIM], long long B[][DIM], long long C[][DIM])
{
	int i, j, k;
	for (i = 0; i < d; i++) {
		for (j = 0; j < d; j++) {
			for (k = 0, C[i][j] = 0; k < d; k++) C[i][j] += A[i][k] * B[k][j] % Mod;
			C[i][j] %= Mod;
		}
	}
}

void pow_matrix(int d, long long A[][DIM], long long k, long long B[][DIM])
{
	int i, j;
	long long C[2][DIM][DIM], D[DIM][DIM];
	copy_matrix(d, A, C[0]);
	for (i = 0; i < d; i++) for (j = 0; j < d; j++) B[i][j] = 0;
	for (i = 0; i < d; i++) B[i][i] = 1;
	for (i = 0, j = 1; k > 0; i ^= 1, j ^= 1, k >>= 1) {
		prod_matrix(d, C[i], C[i], C[j]);
		if (k % 2 == 1) {
			prod_matrix(d, B, C[i], D);
			copy_matrix(d, D, B);
		}
	}
}

int main()
{
	long long L;
	int i, N, M, K, flag[11] = {};
	scanf("%lld %d %d", &L, &N, &M);
	for (i = 1; i <= M; i++) {
		scanf("%d", &K);
		flag[K] = 1;
	}
	
	int j, k, ii, jj;
	long long A[DIM][DIM] = {}, B[DIM][DIM];
	for (i = 1, j = 1; j <= N; j++, i += j) A[i][0] = 1;
	for (i = 1, j = 1, k = 1; 1; i++, k++) {
		if (k > j + 1) {
			j++;
			k = 1;
			if (j > N) break;
		}
		if (k != j || flag[j] == 0) { 
			for (ii = 1, jj = 1; jj <= N; jj++, ii += jj) if (jj != j) A[ii][i] = 1;
		} else A[DIM-1][i] = N - 1;
		if (k <= j) A[i+1][i] = 1;
		else A[i][i] = 1;
	}
	A[DIM-1][DIM-1] = N;
	
	long long ans = 0;
	pow_matrix(DIM, A, L, B);
	for (i = 1, j = 1, ans = B[DIM-1][0]; j <= N; j++, i += j + 1) if (flag[j] != 0) ans += B[i][0];
	printf("%lld\n", ans % Mod);
	fflush(stdout);
	return 0;
}