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Size: a a a
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DT
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['Vasya'] ~> 'Vasya'['Vasya', 'Masha'] ~> 'Vasya and Masha'['Vasya', 'Masha', 'Boris'] ~> 'Vasya, Masha and Boris'print("{} and {}".format(', '.join(a[:-1]), a[-1]))S🇷
print("{} and {}".format(', '.join(a[:-1]), a[-1]))A
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