from re import sub
 
 
def link_conjunctions_with_words(text):
    return sub(r'\s+([\wА-Яа-я]{1,2})\s+', r' \1' + '\u00A0', text)
 
 
def link_conjunctions_with_words2(text):
    return sub(r'\s+([\wА-Яа-я]{1,2})\s+', ' \\1\u00A0', text)
 
 
def link_conjunctions_with_words3(text):
    return sub(r'\s+([\wА-Яа-я]{1,2})\s+', ' \\1\u00A0', text)
 
 
text = "кофе с молоком"
 
print(link_conjunctions_with_words(text))
 
print(link_conjunctions_with_words2(text))
 
print(link_conjunctions_with_words3(text))

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