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Buses 1

Instructions:

For each station A, B, C ... fill how many people get on the bus, how many people get off the bus and amount of people who stays in the bus. The bus is empty at the beginning. All passengers leave the bus at the final station.

Example

 
A
B
C
D
 got off 
7
4
 got on 
 in bus
8
4
9


Solution

 
A
B
C
D
 got off 
0
7
4
9
 got on 
8
3
9
0
 in bus
8
4
9


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