import sys
input = sys.stdin.readline

N,S=map(int,input().split())
P=list(map(int,input().split()))

PS=[(P[i],i+1) for i in range(N)]
PS.sort()

PS.append((1<<60,0))

ANS=[]

for i in range(N):
    if abs(PS[i][0]-PS[i-1][0])>S and abs(PS[i][0]-PS[i+1][0])>S:
        ANS.append(PS[i][1])

print(len(ANS))
print(*sorted(ANS))