N,S = map(int,input().split())
P = [-10**10]+list(map(int,input().split()))
P = [(P[i],i) for i in range(N+1)]
P = sorted(P,key=lambda x:x[0])
ans = []
for i in range(1,N+1):
    if i<N:
        if abs(P[i][0]-P[i-1][0])>S and abs(P[i][0]-P[i+1][0])>S:
            ans.append(P[i][1])
    else:
        if abs(P[i][0]-P[i-1][0])>S:
            ans.append(P[i][1])
ans = sorted(ans)
print(len(ans))
print(*ans)