a, s = map(int, input().split())
p = list(map(int, input().split()))
if len(p)==1:
    print(1)
    print(1)
    exit()
p=sorted(enumerate(p), key=lambda x:x[1])

cnt=0
retu=[]
if p[1][1] - p[0][1] >s:
    cnt=1
    retu.append(p[0][0]+1)
for i in range(1,a-1):
    if p[i][1]-p[i-1][1]>s and p[i+1][1]-p[i][1]>s:
        cnt+=1
        retu.append(p[i][0]+1)
if p[-1][1] - p[-2][1] >s:
    cnt+=1
    retu.append(p[-1][0]+1)
retu.sort()
print(cnt)
print(*retu)