Copy using the $?$ wildcard the three files let$1.$doc, let$2.$doc, and let$3.$doc from the letters directory to the work$/$misc directory. Once copied, rename the new files $($the ones in the misc directory$)$ into rpt$1.$doc, rpt$2.$doc, and rpt$3.$doc. When renaming, you have to do this explicitly and not try to use a wildcard. It would appear at first that a wildcard could make the renaming easier, but it turns out to be ridiculously hard to use a wildcard in this case.

Tests: Complete

letters$/$let$1.$doc $->$ work$/$misc$/$rpt$1.$doc FAILED

letters$/$let$2.$doc $->$ work$/$misc$/$rpt$2.$doc FAILED

letters$/$let$3.$doc $->$ work$/$misc$/$rpt$3.$doc FAILED