Extract and display the leading token from a command-line argument

Print the input string with exactly one space between words and no leading or trailing whitespace

Display the last word of a single string argument

Output the words of a string in reverse sequence

Print a sentence with words separated by a fixed wide gap

Print a string with each space replaced by enough spaces to reach the next 8-column tab stop

Rotate the first word of a string to the end of the word sequence