Hast du dir die Spezifikationen zu
Interleaved 2 of 5 schon einmal angesehen?
Ich denke nicht, denn dann würde es dich nämlich nicht wundern.
Zitat:
Because digits are encoded by pairs, only an even number of digits can be encoded. Typically an odd number of digits is encoded by adding a "0" as first digit, but sometimes an odd number of digits is encoded by using five narrow spaces in the last digit.
https://en.wikipedia.org/wiki/Interleaved_2_of_5