$ fq -d asn1_ber d tc4.ber
   |00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f|0123456789abcdef|.{}: tc4.ber (asn1_ber)
   |                                               |                |  error: asn1_ber: error at position 0xb: length 127 reserved
0x0|9f                                             |.               |  class: "context" (2)
0x0|9f                                             |.               |  form: "primitive" (0)
0x0|9f ff ff ff ff ff ff ff ff 7f                  |..........      |  tag: 18446744073709551615
0x0|                              ff|              |          .|    |  unknown0: raw bits