unsigned short int s_length = strlen(s);
    char s_tt[128] = {0}, t_tt[128] = {0};
	for (unsigned short int i0; i<s_length; i++) {
	    if (s_tt[s[i]] != t_tt[t[i]]) {
	        return false;
	    }
	    s_tt[s[i]] = i+1;
	    t_tt[t[i]] = i+1;
	}
	return true;