Methods whose names begin with \code{s_} are similar to the functions
beginning with \code{r_}, but the code will be granted access to
-restricted versions of the standard I/O streans \code{sys.stdin},
+restricted versions of the standard I/O streams \code{sys.stdin},
\code{sys.stderr}, and \code{sys.stdout}.
\begin{funcdesc}{s_eval}{code}
Methods whose names begin with \code{s_} are similar to the functions
beginning with \code{r_}, but the code will be granted access to
-restricted versions of the standard I/O streans \code{sys.stdin},
+restricted versions of the standard I/O streams \code{sys.stdin},
\code{sys.stderr}, and \code{sys.stdout}.
\begin{funcdesc}{s_eval}{code}