GolfScript, 13-25 = -12 bytes
.~13*(25if n*
Explanation
if # If
. # Input is not a null string:
~ # Evaluate the input
13*(25
n*
GolfScript, 13-25 = -12 bytes
.~13*(25if n*
Explanation
if # If
. # Input is not a null string:
~ # Evaluate the input
13*(25
n*