def format(x):
    return x
def modify(string):
    for x in words:
        if statement:
            return x[v:] + x[:v] + "xx"
        else:
            return x + "xx"
def final(string):
    return format(modify(string))

>>>final("This is a test case")
>>>>Htisxx

>>>final("This is a test case")
>>>>Htisxx isxx axx esttxx asecxx

def first_vowel(word):
    for offset,ch in enumerate(word):
        if ch in "aeiou":
            return offset
    return 0

def modify_word(word):
    v = first_vowel(word)
    return word[v:] + word[:v] + "xx"

def modify(s):
    words = s.split()
    return ' '.join(modify_word(word) for word in words)

def format(s):
    return s

def final(s):
    return format(modify(s))

final("This is a test case")  # => 'isThxx isxx axx esttxx asecxx'

def format(x):
    return x
def modify(string):
    for x in words:
        if statement:
            return x[v:] + x[:v] + "xx"
        else:
            return x + "xx"
def final(string):
    return format(modify(string))