find mkdir system

FizzBuzz.sh

mkdir -p d/x

find d -regextype posix-extended -regex 'd(/x){1,29}' -exec mkdir -p '{}'/x \;

find d -regextype posix-extended \
-regex 'd((/x){3})+' -printf "Fizz" , \
-regex 'd((/x){5})+' -printf "Buzz" , \
-regex 'd((/x){3})+' -o \
-regex 'd((/x){5})+' -o \
-regex 'd(/x)+' -printf "%d" , \
-printf "\n"

ref. https://qiita.com/ogiekako/items/8c24cc71ebe518d9d027#fizzbuzz-%E3%81%AE%E6%A7%8B%E6%88%90
ref. https://www.gnu.org/software/findutils/manual/html_node/find_html/Combining-Primaries-With-Operators.html