/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	static int SeqSearch(int[] list, int key) {
			for (int i = 0; i < list.length; i++)
  			 if (key == list[i])
     		 return i;
			return -1;
	}		
	public static void main (String[] args) throws java.lang.Exception
	{
 
		int[] list = {10,5,2,17,7,6,1,20,3,9,4,12,8};
 
		int z= SeqSearch(list , 9);
		System.out.print(z);
;
 
	}
}

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