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import sys
import string

if len(sys.argv)<2:
    print "Usage: leap.py year, year, year."

sys.exit(0)

for i in sys.argvj[:]:
    try:
y=string.atoi(i)

except:

  print i,"is not a year."

continue

  leap="no"

  if y%400==0:

    leap="yes"

  elif y*100==0:

    leap="no"

  elif y%4==0:

    leap="yes"

  else:

    leap="no"


  print y, "leap:", leap, "in the Gregorian calendar"


if y%4==0:

  leap="yes"

else:

  leap="no"


print y, "leap:", leap, "in the Julian calendar"

print "Calculated leapness for", len { sys.argv ) - 1, "years"