import java.util.*

c = Calendar.getInstance()
c.set(Calendar.MILLISECOND, 0)
c.set(Calendar.SECOND, 0)
c.set(Calendar.MINUTE, 0)
c.set(Calendar.HOUR, 0)
c.set(Calendar.DATE, 21)
c.set(Calendar.MONTH, 5)
c.set(Calendar.YEAR, 2007)

d = Calendar.getInstance()
d.set(Calendar.MILLISECOND, 0)
d.set(Calendar.SECOND, 0)
d.set(Calendar.MINUTE, 0)
d.set(Calendar.HOUR, 0)
d.set(Calendar.DATE, 21)
d.set(Calendar.MONTH, 11)
d.set(Calendar.YEAR, 2009)

millidiff = d.getTimeInMillis() - c.getTimeInMillis()
daydiff = millidiff / (1000L * 60 * 60 * 24)
println (daydiff / 14)