HZN_SUF - Horizon Suffix

HZN_SUF             Horizon suffix (lower case).
          Allowable combinations in HZN_SUF by master horizon: 

       HZN_MAS         HZN_SUF
       
          A    b c a e g h j k p s u v y z x
          B    b c a f g j k m n s t u v x y z
          C    c a g j k s u v y z x 
          O    f h m p k s co z b
          L    may be blank or b
          F    f h m p k s co z b 
          H    may be blank or b          
          R    may be blank or b
          W    may be blank or b

          If HZN_MAS is C, AB, BA, BC or CB the HZN_SUF may be blank.