x=4**2022-6*4**522+5*64**510-3*2**330-100 x is recorded in the number system with the base 8. Determine the number of digits "7" in the record of this number

def count_sevens(x):
  cnt = 0
  for i in str(x):
      if i == '7':
          cnt += 1
  return cnt

count_sevens(4**2022-6*4**522+5*64**510-3*2**330-100)

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