text: public virtual int Stem(char[] s, int len){if (len < 3 || s[len - 1] != 's'){return len;}switch (s[len - 2]){case 'u':case 's':return len;case 'e':if (len > 3 && s[len - 3] == 'i' && s[len - 4] != 'a' && s[len - 4] != 'e'){s[len - 3] = 'y';return len - 2;}if (s[len - 3] == 'i' || s[len - 3] == 'a' || s[len - 3] == 'o' || s[len - 3] == 'e'){return len; }break;}return len - 1;}