n,s=map(int,input().split())
P=list(map(int,input().split()))
P=[[p,i] for i,p in enumerate(P)]
P.sort()

if len(P)==1:
    print(1)
    print(1)
    exit()

ans=[]
for i in range(n):
    if i!=0 and i!=n-1:
        pp,p,np=P[i-1][0],P[i][0],P[i+1][0]
        if s<abs(p-pp) and s<abs(np-p):
            ans.append(P[i][1]+1)
    
    if i==0:
        if s<abs(P[i][0]-P[i+1][0]):
            ans.append(P[i][1]+1)
    if i==n-1:
        if s<abs(P[i][0]-P[i-1][0]):
            ans.append(P[i][1]+1)

print(len(ans))       
print(*sorted(ans))