code: private final void step5() {
          if (k == 0)
              return;
          /* for Bug 1 */ 
          switch (sb.charAt(k-1)) {
          case 'a':
              if (ends("al"))
                  break;
              return;
          case 'c': 
              if (ends("ance"))
                  break;
              if (ends("ence"))
                  break;
              return;
          case 'e':
              if (ends("er"))
                  break;
              return;
          case 'i':
              if (ends("ic"))
                  break;
              return;
          case 'l':
              if (ends("able"))
                  break;
              if (ends("ible"))
                  break;
              return;
          case 'n':
              if (ends("ant"))
                  break;
              if (ends("ement"))
                  break;
              if (ends("ment"))
                  break;
              /* element etc. not stripped before the m */
              if (ends("ent"))
                  break;
              return;
          case 'o':
              if (ends("ion") && j >= 0 && (b[j] == 's' || b[j] == 't'))
                  break;
              /* j >= 0 fixes Bug 2 */
              if (ends("ou"))
                  break;
              return;
              /* takes care of -ous */
          case 's':
              if (ends("ism"))
                  break;
              return;
          case 't': 
              if (ends("ate"))
                  break;
              if (ends("iti"))
                  break;
              return;
          case 'u':
              if (ends("ous"))
                  break;
              return;
          case 'v':
              if (ends("ive"))
                  break;
              return;
          case 'z':
              if (ends("ize"))
                  break;
              return;
          default:
              return;
          }
          if (m() > 1) k = j;
      }
docs: /* step5() takes off -ant, -ence etc., in context <c>vcvc<v>.