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import mathisPrime = Truedef checkprime (x,z):   #global isPrime    if x%z == 0:       return 0   if z <= x:       checkprime (x,z+1)   return 1def range(x,y):   if x<=y:       isPrime=checkprime(x,z)       if isPrime == 1:           print x,'einai prime'       else:           print x,'den einai prime'       range(x+1,y)   else :       returnx=int(input('Doste x  :'))y=int(input('Doste y :'))z=2range(x,y)