Q8.md

public static void checkChuCai(char c){
    String s = "" + c;
    if(s.matches("[a-zA-Z]")){
        if (s.matches("[ueoaiUEOAI]")){
            System.out.println(String.format("%c la nguyen am",c));
        }
        else {
            System.out.println(String.format("%c la phu am",c));
        }
    }
    else System.out.println(String.format("%c khong là nguyen am, phu am",c));
}