bash – SH Write a file with content of no special character

So, I have a challenge and it is as follows.

You can access a normal shell (sh) during a clean installation of RHEL 6. Write arbitrary content to file.txtbut without the following characters.

# &  + -% @ = :; , & # 39; "^` ~ _ |! /? * $ # < > [ ]    {} ()

I can use as touch file or rm file but tap file.txt or echo content> file.txt is not allowed because of . and >.

Is it only possible?