Search Results

Use find command to gather the list of all sub-directories or files:
for dir in $( find . -type d )
do
....
done
OR
for file in $( find . -type f )
do
....
done

Is this what you are trying to acheive?
for dir in A B C
do
mkdir -p ${dir}/data; mkdir -p ${dir}/count; mkdir -p ${dir}/count/result;
done