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module Week
First_day = "Sunday"
def Week.weeks_in_month
puts "You have four weeks in a month"
end
def Week.weeks_in_year
puts "You have 52 weeks in a year"
end
end
class Decade
include Week
no_of_yrs=10
def no_of_months
puts Week::First_day
number=10*12
puts number
end
end
d1=Decade.new
puts Week::First_day
Week.weeks_in_month
Week.weeks_in_year
d1.no_of_months
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