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Ethan has been slacking off at school, and the certificate doesn't look like something he'd dare show his parents.
Write the method

String fix(String rcard)

which Ethan can use to get the certificate corrected to be salon-qualified.


The grades should be replaced as follows:
four --> eight
five --> nine
six --> ten


Example method call:
public static void main(String[] args) {
    String report = "Math: four, Geography: six, Biology: seven";
    String fixed= fix(report);
    System.out.println(fixed);
}
Program outputs:
Math: eight, Geography: ten, Biology: seven



============================




import java.util.Random;

public class Test{
    public static void main(String[] args){
        final Random r = new Random();
        
        String[] subjects = "Math Chemisty English Physics PE Religion Biology Geography".split(" ");
        String[] g = "four five six seven eight".split(" ");
        
        for (int i=1; i<=3; i++) {
            System.out.println("Test " + i);
            String rCard = "";
            for (String s : subjects) {
                // r.nextInt(5) - random int from 0 to 4 (inclusive)
                rCard += s + ": " + g[r.nextInt(5)];
                rCard +=", ";
            }
            
            // removes the trailing ", " from the LAST ENTRY (<subjects>: <g>)
            // OF THE LONG STRING
            rCard = rCard.substring(0, rCard.length() -2);
            
            System.out.println("Report card before: ");
            System.out.println("" + rCard);
            System.out.println("Report card fixed: ");
            System.out.println(fix(rCard));
            System.out.println("");
            
        }
    }

    //ADD
    // public static String fix(String rcard) {
    //     String fixed = "";
        
    //     if (rcard.contains("four")) {
    //         fixed = rcard.replace("four", "eight");
    //     }
    //     if (rcard.contains("five")) {
    //         fixed = rcard.replace("five", "nine");
    //     }
    //     if (rcard.contains("six")) {
    //         fixed = rcard.replace("six", "ten");
    //     }
    //     else {
    //         fixed = rcard;
    //     }
        
    //     return fixed;
    // }

    public static String fix(String rcard) {
        // String fixed = "";
        
        if (rcard.contains("four")) {
            rcard = rcard.replace("four", "eight");
        }
        if (rcard.contains("five")) {
            rcard = rcard.replace("five", "nine");
        }
        if (rcard.contains("six")) {
            rcard = rcard.replace("six", "ten");
        }
        
        return rcard;
    }



}









Test 1
Report card before: 
Math: five, Chemisty: six, English: eight, Physics: seven, PE: eight, Religion: eight, Biology: eight, Geography: five
Report card fixed: 
Math: nine, Chemisty: ten, English: eight, Physics: seven, PE: eight, Religion: eight, Biology: eight, Geography: nine

Test 2
Report card before: 
Math: four, Chemisty: five, English: five, Physics: five, PE: seven, Religion: eight, Biology: five, Geography: seven
Report card fixed: 
Math: eight, Chemisty: nine, English: nine, Physics: nine, PE: seven, Religion: eight, Biology: nine, Geography: seven

Test 3
Report card before: 
Math: six, Chemisty: six, English: four, Physics: five, PE: six, Religion: eight, Biology: five, Geography: seven
Report card fixed: 
Math: ten, Chemisty: ten, English: eight, Physics: nine, PE: ten, Religion: eight, Biology: nine, Geography: seven