import static java.lang.Math.pow;


public class NumberUtilities {
    
    public static String getRange(int start) {
        
        String s="";
        
        for(int i =0; i < start; i++)
        {
            s = s +i;
        }
        return s;
    }
    
    public static String getRange(int start, int stop) {
        String s2 = "";
        for(int i = start; i<stop; i++)
        {
            s2 = s2 + i;
        }
        return s2;
    }


    public static String getRange(int start, int stop, int step) {
        String s3 = "";
        for(int i = start; i < stop; i+=step)
        {
            s3 = s3 +i;
        }
        return s3;
    }
    
    public static String getEvenNumbers(int start, int stop) {
        String s4 = "";
        for(int i = start; i < stop; i++)
        {
            if((i&1)==0)
            {
                s4+=i;
            }
        }
        
       return s4;
    }


    public static String getOddNumbers(int start, int stop) {
        String s5 = "";
        for(int i = start; i<stop; i++)
        {
            if((i&1)!=0)
            {
                s5+=i;
            }
        }
       
        return s5;
    }


    public static String getExponentiations(int start, int stop, int exponent) {
        String s6="";
        
        for(int i = start; i <= stop; i++)
        {
            s6 = s6 + (int)Math.pow(i, exponent);
            
        }

        return s6;
    }
}