print('n =',123)
print('f =',456.789)
print('s1 = \'Hello,world\'')
print('s2 = \'Hello, \\\'Adam\\\'\'')
print('s3 = r\'Hello,\"Bart\"\'')
print('''s4 = r\'\'\'Hello,
Lisa!\'\'\'''')
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Pain德拉贡
print('n =',123)
print('f =',456.789)
print('s1 = \'Hello,world\'')
print('s2 = \'Hello, \\\'Adam\\\'\'')
print('s3 = r\'Hello,\"Bart\"\'')
print('''s4 = r\'\'\'Hello,
Lisa!\'\'\'''')