Enumerating Gene Orders - https://rosalind.info/problems/perm/

 from itertools import permutations  
 import math  
 f = open("out.txt", "w")  
 num=5  
 s=1   
 e=s+num  
 p=math.factorial(num)  
 print(p)  
 f.write(str(p) + '\n')  
 l = list(permutations(range(s, e)))  
 for i in range(p):  
   for j in range(num):  
     print(l[i][j], end=' ')  
     f.write(str(l[i][j]) + ' ')  
   print('')    
   f.write('\n')  
 f.close()