Regular Expressions.


[01] Recognize the following strings: "bat," "bit," "but," "hat," "hit," or "hut."





[02] Match any pair of words separated by a single space, i.e., first and last names.





[03] Match any word and single letter separated by a comma and single space, as in last name, first initial.





[05] Match the set of the string representations of all Python longs.





[06] Match the set of the string representations of all Python floats.






Translate each of the following regular expressions into English:

[07] pattern = "hello.*world"





[08] pattern = "^\d+\s\w*$"





[09] pattern = "\b[A-Z][a-z]*\b"




















Translate each of the following English statements into regular expressions:

[10] A digit at the beginning of the string and a digit at the end of the string





[11] A string that contains only whitespace characters or word characters





[12] A string with no whitespace characters






[13] Write a program that loops through lines of a file or standard input, 
each line containing a single word, and prints out words that have two vowels next to one another










[14] Modify the preceding to match words with exactly two vowels occurring anywhere in the word.