##output
initial array contains : this is a good feature
this is a good feature in
this is a good feature in perl
perl popped of arraystack which now contains : this is a good feature in
15
this is a good feature in
thing this is a good feature in
in popped from end of queue
left on stack : thing this is a good feature
stack size is 5
feature popped from end of queue
left on stack : thing this is a good
stack size is 4
good popped from end of queue
left on stack : thing this is a
stack size is 3
a popped from end of queue
left on stack : thing this is
stack size is 2

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