Read the following article and answer the question.

I have been so busy and preoccupied lately . This training and long commute are taking up all of my time . I spend 15 hours of my day getting ready for work , riding to and from work , and being at work . That leaves 9 hours to sleep , eat , and catch up with John and Tim .

What may happen if it 's 18 hours instead of 15 hours ?
I may get very grumpy .