Fiona commutes to work each day. If there is no rush-hour traffic, her commute time is hours. However, there is often rush-hour traffic. Specifically, rush-hour traffic occurs from (7am) until (10am) in the morning and (3pm) until (7pm) in the afternoon. During rush-hour traffic, her speed is reduced by half.
She leaves either on the hour (at XX:00), 20 minutes past the hour (at XX:20), or 40 minutes past the hour (at XX:40).
Given Fiona's departure time, at what time does she arrive at work?
输入格式
The input will be one line, which contains an expression of the form HH:MM, where HH is one of the 24 starting hours (, , ..., ) and MM is one of the three possible departure minute times (, , ).
输出格式
Output the time of Fiona's arrival, in the form HH:MM.
样例
样例输入 1
05:00
样例输出 1
07:00
样例输入 2
07:00
样例输出 2
10:30
样例输入 3
23:20
样例输出 3
01:20
数据范围与提示
Explanation for Output for Sample Input 1
Fiona does not encounter any rush-hour traffic, and leaving at am, she arrives at exactly am.
Explanation for Output for Sample Input 2
Fiona drives for hours in rush-hour traffic, but only travels as far as she normally would after driving for hours. During the final minutes ( hours) she is driving in non-rush-hour traffic.
Explanation for Output for Sample Input 3
Fiona leaves at pm, and with non-rush-hour traffic, it takes two hours to travel, so she arrives at am the next day.
