the readers of the magazine was invited to send letters with their personal information to the magazine office within two weeks.
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the reader of the magazine
a readers of the magazine
the magazines'readers
invited
being invited
is invited
were invited
a letter for personal information
its letter with the personal information
their letters from their personal information
the letters of their personal information
to the magazine's office within
for the magazine office in
at the office's magazine before
into the office magazine for