a=0
i=0
z=3
x=5
f=0
b=0
loop do
   i+=1
   if (i%z)==0
      a=a+i
#      p a
   elsif i>=1000
      break
   else
      next
   end
end

loop do
   f+=1
   if (f%x)==0
      b=b+f
#      p b
   elsif f>=1000
      break
   else
      next
   end
end

#a=a-i
#b=b-f
p a
p b
p a+b