If you have a text sprite on the stage and it is set to be
editable, then you have an input text sprite. Anything that the
user types into that sprite is available to you by referencing the
text member's text property:
put member("input text").text
It's always best to name your members and then use that name
to refer to it. It's simpler and more flexible than refering to
member(3,4), for instance.
Once you have that member's text property value, you can use
it to create the text for any other text member.