from itertools import * 
 from fnmatch import fnmatch 
  
 alf = sorted('АЭРОБУС') 
 mask = '*Р?Р*' 
 ans = [] 
 for i, s in enumerate(product(alf, repeat=5), 1): 
     sl = ''.join(s) 
     if sl.count('У') == 0 and fnmatch(sl, mask): 
         if i % 2 == 0 and 'РРР' not in sl: 
             ans.append((i, sl)) 
 print(len(ans)) 
 print(ans) 
 

 
 from itertools import product 
  
 A = sorted("АЭРОБУС") 
  
 count = 0 
 i = 1 
 for w in sorted(product(A, repeat=5)): 
   s = ''.join(w) 
   for c in "АЭОБУС": 
     s = s.replace(c, '.') 
   if i % 2 == 0 and 'Р.Р' in s and w.count('У') == 0: 
     count += 1 
   i += 1 
  
 print( count )