def two_sum(a, b):
 x = (a + b)
 eb = (x - a)
 eb = (b - eb)
 ea = (x - b)
 ea = (a - ea)
 return (x, (ea + eb))

def two_sum ( a , b ) : x = ( a + b ) eb = ( x - a ) eb = ( b - eb ) ea = ( x - b ) ea = ( a - ea ) return ( x , ( ea + eb ) )
add a and b exactly .