N,S = map(int, input().split())
P = list(map(int, input().split()))
A = []
for i,j in enumerate(P):
    A.append((j,i+1))
A.sort()
ans = []
for i in range(N):
    flag = False

    if i>0 and abs(A[i][0]-A[i-1][0]) <= S:
        flag = True

    if i<N-1 and abs(A[i][0]-A[i+1][0]) <= S:
        flag = True
    
    if flag == False:
        ans.append(A[i][1])
print(len(ans))
ans.sort()
print(*ans)