class Solution {
public char findTheDifference(String s, String t) {
char c1[]=s.toCharArray();
char c2[]=t.toCharArray();
Arrays.sort(c1);
Arrays.sort(c2);
for(int i=0;i<s.length();i++){
if(c1[i]!=c2[i]){
return c2[i];
}
}
return(c2[s.length()]);
}
}