print('123')
print('456.789')
print("'Hello,world'")
print('\'Hello,\\\'Adam\\\'\'')
print('r\'Hello,\"Bart\"\'')
print('''r\'\'\'Hello,
Lisa!\'\'\'''')
print('------------------------------------------------')
n = '123'
f = '456.789'
s1 = "'Hello,world'"
s2 = '\'Hello,\\\'Adam\\\'\''
s3 = 'r\'Hello,\"Bart\"\''
s4 = '''r\'\'\'Hello,
Lisa!\'\'\''''
print('n = ',n)
print('f = ',f)
print('s1 = ',s1)
print('s2 = ',s2)
print('s3 =',s3)
print('s4 =',s4)
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正晓恰好出生在早晨
print('123')
print('456.789')
print("'Hello,world'")
print('\'Hello,\\\'Adam\\\'\'')
print('r\'Hello,\"Bart\"\'')
print('''r\'\'\'Hello,
Lisa!\'\'\'''')
print('------------------------------------------------')
n = '123'
f = '456.789'
s1 = "'Hello,world'"
s2 = '\'Hello,\\\'Adam\\\'\''
s3 = 'r\'Hello,\"Bart\"\''
s4 = '''r\'\'\'Hello,
Lisa!\'\'\''''
print('n = ',n)
print('f = ',f)
print('s1 = ',s1)
print('s2 = ',s2)
print('s3 =',s3)
print('s4 =',s4)