public int solution(String s) {
int answer = 0;
String change = s.replace("zero","0")
.replace("one","1")
.replace("two","2")
.replace("three","3")
.replace("four","4")
.replace("five","5")
.replace("six","6")
.replace("seven","7")
.replace("eight","8")
.replace("nine","9");
answer = Integer.parseInt(change);
return answer;
}