combo.java

class printCombo{
	public static void main(String srgs[]){
		int i,j;
		String s = "abcde";
		for(i=0;i<5;i++){
			for(j=0;j<5;j++){
				System.out.println(s.charAt(i)+""+s.charAt(j));
			}
		}
	}
}