declare -a special_chars=("!" "@" "#" "$" "%" "^" "_" "-" "=" "+" "[" "]" "(" ")" "{" "}" "'" ":" "," "." ";" " " "\"" "<" ">")

if [ "$1" == 1 ]; then # create playground (before running the bash script)
    for special_char in "${special_chars[@]}"; do
        mkdir -p "/test1/a${special_char}b"
        touch "/test1/a${special_char}b/data"
    done
else # test playground output (after running the bash script)
    for special_char in "${special_chars[@]}"; do
        mkdir -p "/tmp/test1/a${special_char}b"
        if [ "$?" -ne 0 ]; then
            exit 1
        fi
    done
fi