diff --git a/2019/ciura/pl.alt.sh b/2019/ciura/pl.alt.sh
index f481b99b3..c51a08ad1 100755
--- a/2019/ciura/pl.alt.sh
+++ b/2019/ciura/pl.alt.sh
@@ -1,3 +1,3 @@
 #!/usr/bin/env bash
 set -x
-LC_ALL=C ./getwords.sh pl | LC_ALL=C grep -vE '^[^aiouwz]$' | LC_ALL= ./prog.alt aąbcćdeęfghijklłmnńoóprsśtuwyzźż
+LC_ALL=C ./getwords.sh pl | LC_ALL=C grep -vE '^[^aiouwz]$' | LC_ALL='' ./prog.alt aąbcćdeęfghijklłmnńoóprsśtuwyzźż