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