This route string seems cannot be recognized and generated by IF, as I and @Korgast both tested:
UHSS IDRUT DASKO AMUPI FA OKNOR LEBNA KEDOR RESTA ROTLO BULAT MAZIL UUWW
This is how it goes:
This is how other strings goes:
Every fix in this route exists in the database, as I added them one by one:
I was confused and hope someone can explain this!