diff --git a/a1/program.c b/a1/program.c
index 7d4949d..cb9bfdb 100644
--- a/a1/program.c
+++ b/a1/program.c
@@ -32,7 +32,7 @@ int main()
         {
             putchar(tolower(vstup));
         }
-        else
+        else if (vstup >= 32 && vstup <= 127)
         {
             putchar(vstup);
         }