string = 'a,b,c d!e.f\ncanada\tjapan&germany'
identifiers = '!"#$%&\'()*+,-./:;<=>?@[\\]^_`{|}~\n\t '
listitems = "".join((' ' if c in identifiers else c for c in string)).split()
for item in listitems:
    print(item)

a
b
c
d
e
f
canada
japan
germany

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