In cold weather, meteorologists report an index called the wind chill
factor, which takes into account the wind speed and the temperature.
The index provides a measure of the chilling effect of wind at a given
air temperature. Wind chill may be approximated by the following
formula:


	W = 33 - ((10 sqrt(v) -v + 10.5)*(33-t))/23.1

where
v = wind speed in meters/sec
t = temperature in degrees Celsius
W = wind chill index (in degree Celsius).

Write a program that reads in a wind speed in miles per hour, a
temperature in degrees fahrenheit, and outputs the wind chill index in
degrees fahrenheit. The program should repeat until it is given a wind
speed of 0.