print('n=',123)
print('f=',456.789)
print('s1=','\'Hello,world\'')
print('s2=','\'Hello,\\\'Adma\\\'\'')
print('s3=','r\'Hello,"Bart"\'')
print('s4=','r\'\'\'Hello,\nLisa!\'\'\'')
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牧殇3399
print('n=',123)
print('f=',456.789)
print('s1=','\'Hello,world\'')
print('s2=','\'Hello,\\\'Adma\\\'\'')
print('s3=','r\'Hello,"Bart"\'')
print('s4=','r\'\'\'Hello,\nLisa!\'\'\'')