PACKAGE |STAT Data Manipulation and Analysis, by Gary Perlman
NAME reverse - reverse lines, fields or characters within lines
SYNOPSIS reverse [-cfl]
DESCRIPTION reverse reverses lines, space separated fields, or characters within lines read from the standard input.
OPTIONS
-c
reverse characters within lines.
-f
reverse fields within lines. Fields are separated by any white space (e.g., tabs, blanks), and may be delimited by double or single quotes to allow inclusion of spaces inside fields. When fields are reversed, any white space between fields is replaced by a single tab. There is a limit to the number of fields that can be reversed; see the -L option.
-l
reverse lines. This is the default action when no options are selected. There is a limit to the number of lines that can be reversed; see the -L option.
The following standard help options are supported. The program exits after displaying the help.
-L
Display limits
-O
Display options and values
-V
Display version number and date
EXAMPLES 
echo 11 21 31 41 51 61  |  reverse -c
  16 15 14 13 12 11
echo 11 21 31 41 51 61  |  reverse -f
  61 51 41 31 21 11
echo 11 21 31 41 51 61  |  reverse -fc
  11 12 13 14 15 16
LIMITS Use the -L option to determine the program limits.
UPDATED October 1985