using System;

public class Program

{

    public static void Main()

    {

        int i,j,k;

Console.WriteLine("\nFOR giam dan:");

for( i = 10; i > 0;  i-- )

{

  Console.WriteLine("{0}\t",i);

}

Console.WriteLine("\nWHITE giam dan:");

j=10;

while( j > 0 )

{

  Console.Write("{0}\t", j);

  j--;

}

Console.WriteLine("\nDO...WHILE giam dan:");

k = 10;

do

{

  Console.Write("{0}\t",k);

  k--;

} while (k > 0);

}

}