N,S = map(int,input().split())
P = list(map(int,input().split()))
if N == 1:
    print(1)
    print(1)
    exit()

X = []
for i,p in enumerate(P,start = 1):
    X.append((p,i))
X.sort()
ans = []
if X[1][0] - X[0][0] > S:
    ans.append(X[0][1])
if X[N-1][0] - X[N-2][0] > S:
    ans.append(X[N -1][1])
for i in range(1, N-1):
    if X[i][0] - X[i-1][0] > S and X[i+1][0] - X[i][0] > S:
        ans.append(X[i][1])
ans.sort()
print(len(ans))
if len(ans) > 0:
    print(*ans)