Standard input is empty

#<Enumerator: 1..6:each>

!
!=
!~
<=>
==
===
=~
__id__
__send__
all?
any?
chunk
chunk_while
class
clone
collect
collect_concat
count
cycle
define_singleton_method
detect
display
drop
drop_while
dup
each
each_cons
each_entry
each_slice
each_with_index
each_with_object
entries
enum_for
eql?
equal?
extend
feed
find
find_all
find_index
first
flat_map
freeze
frozen?
grep
grep_v
group_by
hash
include?
inject
inspect
instance_eval
instance_exec
instance_of?
instance_variable_defined?
instance_variable_get
instance_variable_set
instance_variables
is_a?
itself
kind_of?
lazy
map
max
max_by
member?
method
methods
min
min_by
minmax
minmax_by
next
next_values
nil?
none?
object_id
one?
partition
peek
peek_values
pp
private_methods
protected_methods
public_method
public_methods
public_send
reduce
reject
remove_instance_variable
respond_to?
reverse_each
rewind
select
send
singleton_class
singleton_method
singleton_methods
size
slice_after
slice_before
slice_when
sort
sort_by
sum
taint
tainted?
take
take_while
tap
to_a
to_enum
to_h
to_s
trust
uniq
untaint
untrust
untrusted?
with_index
with_object
yield_self
zip