###
# piglatin.py
#
# author: Kristina Striegnitz
#
# version: 1/27/2009
#
###

def eng_to_pig(eng_word):
    """
    Takes one English word as argument, translates it into Pig-latin
    and returns the result.
    """

    if len(eng_word) == 0:
        pig_word = eng_word

    # word starts with a vowel
    elif eng_word[0] in "aeiou":
        pig_word = eng_word + "way"

    # word starts with a consonant followed by a vowel
    elif eng_word[1] in "aeiou":
        pig_word = eng_word[1:] + eng_word[0] + "ay"

    # word starts with two consonants followed by a vowel
    elif eng_word[2] in "aeiou":
        pig_word = eng_word[2:] + eng_word[0] + eng_word[1] + "ay"

    # word starts with three consonants (or more, but only three are moved to the end)
    else:
        pig_word = eng_word[3:] + eng_word[0] + eng_word[1] + eng_word[2] + "ay"
        
    return pig_word

## To test:
print "pig -> " + eng_to_pig("pig")
print "star -> " + eng_to_pig("star")
print "spray -> " + eng_to_pig("spray")
print "eagle -> " + eng_to_pig("eagle")