s return
"abcde" "c"
"qwer" "we"
class Solution {
public String solution(String s) {
String answer = "";
if(s.length()%2==0){
answer += s.charAt(s.length()/2-1);
answer += s.charAt(s.length()/2);
}else{
answer += s.charAt(s.length()/2);
}
return answer;
}
}