char findChar(char *s)
{
        char *p,*q;
        p=q=s;
        while(*s != '\0')
        {
                while(*p++ != '\0')
                {
                        if(s == p) continue;
                        if(*s == *p){
                                p = s;
                                break;
                        }
                        if(*p == '\0') return *s;
                }
                s++;
        }

}