public class Thing {
    public static void main( String [] args ) {
        int [] list = { -2, 5, 7, 13, 4, 26, -30 };
        int sum = 0;

        for( int i = 1; i < list.length; i = i + 2 ) {
            if( Math.abs( list[ i ] ) < 20 )
                sum += list[ i ];
        }

        System.out.println( "Sum is: " + sum );
    }
}