Задача Мартин улетает

martin = 'Wait for me he shouted I am going with you'
catch_martin()
print(martin)

martin = 'Because you are not some vagabonds you are respectable domestic geese'
catch_martin()
print(martin)

def catch_martin():
    from operator import itemgetter
    global martin
    
    kadfr = list()
    
    for w in martin.split():
        if len(set(w)) >= 4:
            kadfr.append([w, len(set(w))])
            
    kadfr = sorted(kadfr, key=itemgetter(1))
    martin = ''
    a = list()
    
    for w in kadfr:
        a.append(w[0])
        
    martin = ' '.join(a)

def catch_martin():
    from operator import itemgetter
    global martin
 
    kadfr = []
 
    for w in martin.split():
        if len(set(w)) >= 4:
            kadfr.append([w, len(set(w))])
 
    if kadfr:
        kadfr = sorted(kadfr, key=itemgetter(1))
        martin = ' '.join(w[0] for w in kadfr)

def catch_martin():
    global martin
    words = martin.split()
    
    word_counts = {}
    for word in words:
        unique_letters = set(word.lower())
        word_counts[word] = len(unique_letters)
 
    filtered_words = [word for word in word_counts if word_counts[word] >= 4]
    
    filtered_words.sort(key=lambda word: word_counts[word])
    
    martin = ' '.join(filtered_words)