The first of the two signs read as x above has remnants similar to NU, but there is one diagonal wedge too many. It might be a damaged MU. The remnants of the second sign show the very end of two vertical wedges.
If a City 2 (168 and 192, *32.28’, A i 6’) appears to have a typographical error as the last sign of line i 6’ is read as si (instead of ši for IGI). Collation confirms the reading IGI or ši.