----------------------------------------
Command line: ls

Command 1: ls
    No arguments
    Standard input:  [keyboard]
    Standard output: [screen]
----------------------------------------
Command line: ls -l x

Command 1: ls
    Arguments:
        |-l|
        |x|
    Standard input:  [keyboard]
    Standard output: [screen]
----------------------------------------
Command line: wc < x.java

Command 1: wc
    No arguments
    Standard input:  x.java
    Standard output: [screen]
----------------------------------------
Command line: wc -c y.java > out

Command 1: wc
    Arguments:
        |-c|
        |y.java|
    Standard input:  [keyboard]
    Standard output: out
----------------------------------------
Command line: a | b | c

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
    No arguments
    Standard input:  [pipe]
    Standard output: [screen]