WordForm

Code

public class WordForm {    // The problem name is Stemmer.

    public String getSequence(String word) {

        word = word.toUpperCase();

        char c = word.charAt(0);

        String res = (c=='A' || c=='E' || c=='I' || c=='O' || c=='U') ? "V" : "C";

        boolean consonant = (res.equals("C")) ? true : false;

        for (int i = 1; i < word.length(); i++) {

            c = word.charAt(i);

            if (c=='A' || c=='E' || c=='I' || c=='O' || c=='U') {

                if(consonant) {res += "V"; consonant = false;}

            }

            else if (c=='Y' && consonant) {

                res += "V";

                consonant = false;

            }

            else if (!consonant) {

                res += "C";

                consonant = true;

            }

        }

        return res;

    }

}

Explanation

Y가 자음(consonant)과 모음(vowel) 둘 중 어느 것이 String에 기록되는지 확인하면 나머지는 쉽게 풀린다.