i = 0
enc = open("data.bin", "rb") 
size = len(enc)
offset = 4
dec = bytearray()

while offset < size:
    if i == 0:
        val = int.from_bytes(enc[offset:offset+2], 'little')
        offset += 2
        c = 16
    
    if (val & 1) != 0:
        v8 = (enc[offset] & 0xf0) << 4
        v7 = (enc[offset] & 0xf) + 1
        v9 = v8 + enc[(offset + 1)]
        offset += 2

        pos = len(dec) - v9
        for j in range(v7):
            dec.append(dec[pos + i])
    else:
        dec.append(enc[offset])
        offset += 1
    
    val >>= 1
    c -= 1

print(dec)