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

x = 4**2022-6*4**522+5*64**510-3*2**330-100
s = str(x)
print s.count('7')

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