-(_??_ (string-copy! (make-string 10) 0 "hello" 0 5) "hello ")
-(_??_ (string-copy! (make-string 10) 1 "hello" 0 5) " hello ")
-(_??_ (string-copy! (make-string 10) 0 "hello" 0 5) "hello ")
+(string-copy! (make-string 10) 0 "hello" 0 5)
+(string-copy! (make-string 10) 1 "hello" 0 5)
+(string-copy! (make-string 10) 0 "hello" 0 5)