#def nus(a):
#    for i in range(1,a+1):
#        return i
#        yield i
#print(nums(10))
#num=nums(10)
#for i in num:
#    print(i)
#for i in num:
#    print(i)
#def evens(n):
#    for i in range(0,n+1):
#        yield i
#even=evens(24)
#print(even)
#for i in even:
#    if i%2==0:
#        print(i)
#squares=(i**2 for i in range(1,11))
#print(squares)
#for i in squares:
#    print(i)
#print(next(squares))
#print(next(squares))