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413. Clock

Time Limit:	1 seconds
Memory Limit:	65536KB
Points:	100

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Clock's hands move with constant angular speeds and show h hours and m minutes.
Write the program to find number of full minutes till the nearest moment in which hands will coincide.

Input

Two numbers h (0<=h<=11) and m (0<=m<=59), separeated by space.

Output

Number of full minutes.

Samples

Input	Output
0 0	0
1 1	4

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413.

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time generating 0.109 sec.