diff --git a/a1/program.c b/a1/program.c
index 831a751..07bfba4 100644
--- a/a1/program.c
+++ b/a1/program.c
@@ -23,12 +23,12 @@ int main()
 
         if (islower(vstup) != 0) 
         {
-            toupper(putchar(vstup));
+            putchar(toupper(vstup));
         }
 
         if (isupper(vstup) != 0)
         {
-            tolower(putchar(vstup));
+            putchar(tolower(vstup));
         }
 
         if (iscntrl(vstup) != 0)