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Problem B
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Svala has been waiting for forever and the wait barely shortens, it seems. She looked at the clock quite a while ago so she’s going to check what the time is. Svala doesn’t know how to read the time off a clock though, can you help her and tell her how many minutes have passed since she first looked at the time?

Input

The input consists of two lines, both in the format $HH:MM$. The first line shows what the time was when Svala first looked at the clock. The second line shows what the time is now.

Output

Print one line with a single integer, the number of minutes Svala has waited. She will never wait for $24$ hours or more.

Scoring

Group

Points

Constraints

1

50

Svala will not wait past midnight.

2

50

No further constraints.

Sample Input 1 Sample Output 1
02:02
20:20
1098
Sample Input 2 Sample Output 2
13:37
13:42
5
Sample Input 3 Sample Output 3
20:20
02:02
342

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