def parchment(m, divisor=' '):
    global snuffbox
    s = list(snuffbox[:])
    for i in range(len(s)):
        b = list(s[i])
        sp = []
        for f in range(len(b)):
            if b[f] not in m:
                sp.append(b[f])
        s[i] = divisor.join(set(sp))
    snuffbox = tuple(s)


snuffbox = ('black', 'powder', 'piece', 'parchment')
parchment('mutabor', divisor=';')
print(snuffbox)