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