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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def replace_wrep(t:str) -> str:
    "Replace word repetitions in `t`."
    def _replace_wrep(m:Collection[str]) -> str:
        c,cc = m.groups()
        return f' {TK_WREP} {len(cc.split())+1} {c} '
    re_wrep = re.compile(r'(\b\w+\W+)(\1{3,})')
    return re_wrep.sub(_replace_wrep, t)