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 or
ł. 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
h or even d, g, n, m
Rypyka, Rypyha or Rypyda, Rypyga, Rypyna..