1010 - The Angle

Time limit : 1 sMemory limit : 32 mb
Submitted : 10261Accepted : 2633

Problem Description

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.

Input


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.

Output


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

Sample Input

12 0
12 30
6 0
3 0
0 0

Sample Output

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.

Hint

Source