/pre_testing3/
drwxr-xr-x [up]
-rw-r--r-- 2020-11-24 09:04 +0000 3590 postfix.scala
-rw-r--r-- 2020-11-24 09:04 +0000 3077 postfix2.scala
-rwxr-xr-x 2020-11-24 09:04 +0000 4607 postfix_test.sh
-rw-r--r-- 2020-11-24 09:04 +0000 326 postfix_test7.scala
-rw-r--r-- 2020-11-24 09:04 +0000 332 postfix_test8.scala
-rw-r--r-- 2020-11-24 09:04 +0000 998 postfix_test9.scala