문제풀이 import java.io.*; import java.util.regex.Matcher; import java.util.regex.Pattern; interface Main{ static void main(String[] args) throws IOException { BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(System.out)); String regex = "([a-z])|([A-Z])|([\\d])|([ ])"; String str = ""; Matcher matcher; while((str..