func insertNodeAtPosition(llist *SinglyLinkedListNode, data int32, position int32) *SinglyLinkedListNode {
	// find pos
	currNode := llist
	for position > 1 {
		position--
		currNode = currNode.next
	}

	// insert node
	newNode := &SinglyLinkedListNode{data: data}
	newNode.next = currNode.next
	currNode.next = newNode
	return llist
}