aaaabbb.java

public class One {
    public static void main(String[] args) {
        int A = 2, B = 5;
        int a = 1, b = 1; String result = "";
        while ((A+B)>0) {
            if (A > B) {
                if (a < 3) {
                    result += "a";
                    a++; b=1; A--;
                } else {
                    result += "b";
                    b++; a=1; b--;
                }
            } else {
                if (b < 3) {
                    result += "b";
                    b++; a=1; B--;
                } else {
                    result += "a";
                    a++; b=1; A--;
                }
            }
        }
        System.out.println(result);
    }
}