PROGRAMMING:Find the location of Olympic rings

The English words of the five colors of the Olympic rings are arranged in a certain order {"red", "blue", "yellow", "green", "black"}, the pointer array is defined and initialized, the English words of any color are input, the position value of the color is searched and output from the existing color, if not, the output "not found".
###Input format:
Enter a word for the color.
###Output format:
Output the position value corresponding to the word, if not found, output not found.
###Input example:
```in
yellow
```
###Output example:
```out
three
```







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