Time limit : 1 s | Memory limit : 32 mb |
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Submitted : 10261 | Accepted : 2633 |

The interval angle between the hour hand and the minute hand is always among 0 degree and 180 degree(including 0 and 180 degree). For example, when it's 12 o'clock, the angle of the two hands is 0 while 6:00 is 180 degree. Try to calculate any degree when it's between 12:00 to 11:59.

The input data are of various situations. Every team consists of two numbers : the first number stands for the hour(great than 0 and less than or equal to 12) and second represents the minute( among [0, 59]). The input ends when the two numbers are both zeros.

Print out the minimum angle between the two hands with the normal time form outputed.

12 0 12 30 6 0 3 0 0 0

At 12:00 the angle is 0.0 degrees. At 12:30 the angle is 165.0 degrees. At 6:00 the angle is 180.0 degrees. At 3:00 the angle is 90.0 degrees.