(.  'ALFA' 'BETA' 'GAMMA' 'DELTA'
         'LAMBDA'
     .) 
    

=>>>CALLS RULE #HEAD IN STATEMENT
  1-ST ARGUMENT($):  
     (.  'ALFA' 'BETA' 'GAMMA' 'DELTA'
         'LAMBDA'
     .) 
    
<<<=EXITS FROM RULE #HEAD: SUCCESS
RESULT= 'ALFA' 'ALFA'

=>>>CALLS RULE #TAIL IN STATEMENT
  1-ST ARGUMENT($):  
     (.  'ALFA' 'BETA' 'GAMMA' 'DELTA'
         'LAMBDA'
     .) 
    
<<<=EXITS FROM RULE #TAIL: SUCCESS
RESULT= 
     (.  'BETA' 'GAMMA' 'DELTA' 'LAMBDA'
     .) 
     
     (.  'BETA' 'GAMMA' 'DELTA' 'LAMBDA'
     .)