### FILL OUT THE BELOW RIGHT NOW

''' Purpose: better experience functional development

    Email id: 
    Email id: 

    Pledge: All effort for this assignment has been done as team and when both
            the driver and navigator are present and working together
'''

# helpful named strings

PUNCTUATION = '''!"#$%&'()*+,-./:;<=>?@[\]^_`{|}~'''
WHITE_SPACE = ' \t\n\r\v\f'
EXTRANEOUS  = PUNCTUATION + WHITE_SPACE

def lower( strings ) :
    ''' Returns a new list whose elements are lower case versions of
        those in strings

        Driver:
        Navigator:
    '''

    pass

def unique( strings ) :
    ''' Returns a new version of strings without any duplicate values

        Driver:
        Navigator:
    '''


def strip( strings ) :
    ''' Returns a new version of strings where the corresponding
        elements have leading and trailing extraneous characters
        (punctuation or whitespace) removed

        Driver:
        Navigator:
    '''

    pass

def canonical( strings ) :
    ''' Returns a new version of strings without duplicate values
        where the corresponding elements have leading and trailing
        extraneous characters (punctuation or whitespace) removed

        Driver:
        Navigator:
    '''

    pass