0. [**, **]    A    [44/96]
  1. [AA, **]    
   AA
  1. [A-, **]    B    [6/15]
    2. [AB, **]    
     AB
    2. [A-, B]    D    [5/14]
      3. [AD, B]    
       AD
      3. [A-, BD]    E    [4/13]
        4. [AE, BD]    
         AE
        4. [A-, BDE]    G    [3/12]
          5. [AG, BDE]    
           AG
          5. [A-, BDEG]    H    [2/11]
            6. [AH, BDEG]    
             AH
            6. [A-, BDEGH]    
             AI
             AL
             AM
             AN
             AR
             AS
             AT
             AW
             AX
             AY
  1. [-A, **]    B    [6/10]
    2. [BA, **]    
     BA
    2. [-A, B]    
     FA
     HA
     KA
     LA
     MA
     NA
     PA
     TA
     YA
  1. [**, A]    O    [31/70]
    2. [**, AO]    E    [21/46]
      3. [-E, AO]    
       BE
       DE
       HE
       ME
       NE
       PE
       RE
       WE
       YE
      3. [**, AEO]    I    [13/27]
        4. [-I, AEO]    
         BI
         HI
         LI
         MI
         PI
         SI
         TI
         XI
        4. [**, AEIO]    U    [7/14]
          5. [**, AEIOU]    
           BY
           HM
           MM
           MY
           SH
          5. [-U, AEIO]    
           MU
           NU
           XU
          5. [U-, AEIO]    
           UH
           UM
           UN
           UP
           US
           UT
        4. [I-, AEO]    
         ID
         IF
         IN
         IS
         IT
      3. [E-, AO]    D    [4/10]
        4. [ED, AO]    
         ED
        4. [E-, ADO]    
         EF
         EH
         EL
         EM
         EN
         ER
         ES
         ET
         EX
    2. [-O, A]    D    [5/12]
      3. [-O, AD]    G    [4/11]
        4. [-O, ADG]    H    [3/10]
          5. [-O, ADGH]    
           BO
           JO
           LO
           MO
           NO
           SO
           TO
           WO
           YO
          5. [HO, ADG]    
           HO
        4. [GO, AD]    
         GO
      3. [DO, A]    
       DO
    2. [O-, A]    E    [5/12]
      3. [O-, AE]    F    [4/11]
        4. [O-, AEF]    H    [3/10]
          5. [O-, AEFH]    
           OD
           OM
           ON
           OP
           OR
           OS
           OW
           OX
           OY
          5. [OH, AEF]    
           OH
        4. [OF, AE]    
         OF
      3. [OE, A]    
       OE