N,S=map(int,input().split())
P=list(map(int,input().split()))
if len(P)==1:
    print(1)
    print(1)
    exit()
Q=[]
for i,p in enumerate(P,1):
    Q.append((p,i))
Q.sort()
ans=[]
if abs(Q[0][0]-Q[1][0])>S:
    ans.append(Q[0][1])
for i in range(1,N-1):
    if abs(Q[i][0]-Q[i-1][0])>S and abs(Q[i][0]-Q[i+1][0])>S:
        ans.append(Q[i][1])
if abs(Q[-1][0]-Q[-2][0])>S:
    ans.append(Q[-1][1])
ans.sort()
print(len(ans))
print(*ans)