Level 2 hints for clp
---------------------

Note that in a pipeline that's valid for clp, standard input for the first command will be either [keyboard] or a file.  Standard output for the last command will be either [screen] or file.  In all other cases standard input and standard output will be [pipe].

Observe:

    % java clp
    a | b | c >x     
    ----------------------------------------
    Command line: a | b | c >x
    
    Command 1: a
        No arguments
        Standard input:  [keyboard]
        Standard output: [pipe]
    
    Command 2: b
        No arguments
        Standard input:  [pipe]
        Standard output: [pipe]
    
    Command 3: c
        Arguments:
            |>x|
        Standard input:  [pipe]
        Standard output: [screen]

Note that in the case of a command line with a single command, like "cat", "cat" is both the first and last command.

See clp-hints-3 for the next level of hints.