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import os,sys
f1=os.popen('math ', 'w')
f1.flush()
while 1:
  sys.stdout.write('')
  try:
    line=raw_input()
    f1.writelines(line+'\n')
    f1.flush()
  except KeyboardInterrupt:
    f1.close()
    break
sys.stdout.write('\n')
sys.exit()

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