import "./lookup2bit" as lookup
// /**
// * Three-bit window lookup (2bits + signature bit) in 2bit table
// * using two constraints. Maps the bits `b` to a list of constants `c`
// */
def main(bool[3] b, field[4] c) -> (field):

	field alpha = lookup([b[0], b[1]], c)
	field out = alpha - 2 * if b[2] then alpha else 0 fi
	
	return out