class Solution {
public int[] solution(String s) {
int[] answer = new int[s.length()];
answer[0] = -1;
for(int i = 1; i < s.length(); i++){
answer[i] = -1;
for(int j = 0 ; j < i; j++){
if(s.charAt(i) == s.charAt(j)) {
answer[i] = i -j;
}
}
}
return answer;
}
}