```
def reverse_transformation(byte_values):
flag = bytearray(len(byte_values))

for i in range(len(byte_values)):
transformed_byte = byte_values[i]
original_byte = ((transformed_byte << 5) & 0xFF) | (transformed_byte >> 3)
flag[i] = (original_byte - i) ^ 0x5A

return flag.decode('utf-8')

byte_2020 = [
0xF8, 0xA8, 0xB8, 0x21, 0x60, 0x73, 0x90, 0x83, 0x80, 0xC3,
0x9B, 0x80, 0xAB, 0x09, 0x59, 0xD3, 0x21, 0xD3, 0xDB, 0xD8,
0xFB, 0x49, 0x99, 0xE0, 0x79, 0x3C, 0x4C, 0x49, 0x2C, 0x29,
0xCC, 0xD4, 0xDC, 0x42
]

flag = reverse_transformation(byte_2020)
print(flag)
```