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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_all_caps(x:Collection[str]) -> Collection[str]:
    "Replace tokens in ALL CAPS in `x` by their lower version and add `TK_UP` before."
    res = []
    for t in x:
        if t.isupper() and len(t) > 1: res.append(TK_UP); res.append(t.lower())
        else: res.append(t)
    return res