Here is part of the application with the missing letter.
After looking at the word and letters , I think the missing letter can not be l
. The ł
was not available in tapewriters with English letters.
Also, it doesn't appear it's l
because the spots are indicating it's more then just a simple "line" (as for the letter l
It could be k
or even d, g, n, m
Rypyka, Rypyha or Rypyda, Rypyga, Rypyna..