But Base64 encodes 3 bytes as 4 characters. So 6 characters (excluding padding) is 4.5 bytes, which isn't possible. Maybe the actual meaningful part is "d61w6e" as a code. Alternatively, maybe it's a hexadecimal code. Let me see: d61w6e. Hexadecimal uses 0-9 and A-F. So d61w6e would convert to 0xd61w6e in hex, but 'w' isn't a valid hex character. So that's out.