"Software program" has a merit that "If you code it with a smaller object, it moves as it is even if you enlarge the object".

So, for example, if you have five control targets and then extend it to hundreds of thousands, the program will work well in principle, however it is not always doing well.

If the target remains small, the effect can not be seen. However, if the target becomes larger, the effect often becomes beyond my predictions. This is a prominent phenomenon with big data or AI technology.

Then, I have to select one of the hundreds of thousands of objects and carefully track it.

However, just creating this new tracking program will need tremendous difficulty.

"Programs that do not move as expected" are truly scary things that can not be compared.

And, I was really exhausted with such a program.

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One day I said, "I was exhausted from the bottom of my heart", I told my daughters

"Okay? my children. Do not try to do more than your own ability"

"Set the upper limit of you at 80% of your ability"

"Even if your ability is "assessed low", what's the matter? "

"Even though you can think "Yes, I can", you should have a courage to insist "No I can't". This is a tip for your good life"

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The girls saw their exhausted father with warm eyes and said,

"We understood, Papa. We will never "challenge", so please be relieved."