A manually operated liquid foaming dispenser is attached to the top of a container of liquid and is manually vertically reciprocated to dispense the liquid from the container as a foam. An untwisted yarn of the invention comprises a plurality of filaments in essentially parallel array and from about 0. The strip seal further has a pressure face that has a sinusoidal curvilinear shape with respect to the sealing face. The toggle operated switch is disposed on top of the gas valve and the toggle arm is disposed on top of the toggle operated switch so as to minimize a footprint of an assembly that comprises the gas valve, the toggle operated switch, and the toggle arm. The second set of bits includes a second parity bit, and is received in the second parity circuit during a second clock cycle. Any sub-expression of the input expression which matches an input sub-expression of a transformation rule is replaced with the output sub-expression of that transformation rule to form a sub-expression of the output expression.