Grid Generator Challenge Stretch Goal

echo "    \c"       # \c prevents echo taking a new line at the end of a line
for i in {A..J};    # loop through letters A to J, assign to var i
do
 echo "$i \c"       # echo i then space
done
echo                # echo a blank line

echo "    \c"
for i in {1..10}    # I cudv done A..J
do
 echo "_ \c"        # top of the grid
done
echo

for i in {0..1}{0..9}  # joined curly bracket expansion is the equivalent of 00-19
do
 echo "$i |\c"         # first pipe character
 for i in {A..J}
 do
  echo '_|\c'          # the rest of the boxes
 done
 echo
done