Update README.md

subjects/swapname/README.md

@@ -4,9 +4,9 @@
 
 Write a program that takes two words in the first argument and swaps them.
 - If the number of arguments is not 2, nothing should be printed.
-- The first argument should contain only alphabetic characters and spaces, if not, print `"Error\n"`
-- Skip the spaces only in the first word of the first argument.
+- The first argument should contain only alphabetic characters and spaces and only two word, if not, print `"Error\n"`
 - Print the result with a new line at the end (`'\n'`).
+- Trim space in the beginning and end of the string
 
 ### Usage
 
@@ -17,10 +17,10 @@ $ go run . "Hello World" | cat -e
 World Hello$
 $ go run . "He2 $%hello" | cat -e
 Error$
-$ go run . "   Hello World" | cat -e
+$ go run . "    Hello World   " | cat -e
 World Hello$
-$ go run . "Hello World   " | cat -e
-Error$
 $ go run . "Hello World Hello" | cat -e
 Error$
+$ go run . "Hello" | cat -e
+Error$
 ```