(defun read-integers ()
  (with-open-file (stream *standard-input* :direction :input :external-format :utf-8)
    (loop for line = (read-line stream nil)
          while line
          append (mapcar #'parse-integer (split-sequence-from-string line)))))

(defun split-sequence-from-string (str)
  (let ((start 0)
        (len (length str))
        (result '()))
    (loop for i from 0 to len
          when (or (eql i len) (char= (char str i) #\Space))
          do (when (> i start)
               (push (parse-integer (subseq str start i)) result))
             (setf start (1+ i)))
    (nreverse result)))

(defun main ()
  (let* ((data (read-integers))
         (N (first data))
         (S (second data))
         (P (subseq data 2 (+ 2 N)))
         (indexed-P (loop for i from 0 below N collect (cons (nth i P) (1+ i))))
         (sorted-P (sort (copy-list indexed-P) #'< :key #'car))
         (result '()))
    (loop for i from 0 below N
          for (val . idx) = (nth i sorted-P)
          for left-diff = (if (> i 0) (- val (car (nth (1- i) sorted-P))) most-positive-fixnum)
          for right-diff = (if (< i (1- N)) (- (car (nth (1+ i) sorted-P)) val) most-positive-fixnum)
          for near = (min left-diff right-diff)
          when (> near S)
          do (push idx result))
    (setf result (sort result #'<))
    (with-open-file (stream *standard-output* :direction :output :external-format :utf-8)
      (format stream "~d~%" (length result))
      (dolist (elem result)
        (format stream "~d " elem))
      (terpri stream))))

(main)