Rename sets of files with numbers

rename.sh

# rename a set of files with numbers by adding one
#
# example renaming a set of files like SC-123A.MUS, SC-123B.MUS, etc.
#
#  move files 165-169 up one to be 166-170, leaving room for a new 165
#  ./rename.sh *{165..169}*.MUS 
# 

filenames="$@"
mkdir renamed
# for file in *{170..188}*.MUS
for file in $filenames
do
 number_in_file=$(echo -n $file | sed 's/[^0-9]*//g')
 new_number=$(($number_in_file+1))
 new_filename=$(echo $file | sed "s/$number_in_file/$new_number/")
 echo "mv -v $file renamed/$new_filename"
done