new_contents: print((lambda n,p,t,r:min(1,len(t)/len(r))*__import__(math).pow(p(n,t,r,1)*p(n,t,r,2)*p(n,t,r,3)*p(n,t,r,4),0.25))(lambda s,l:[s[i:i+l]for i in range(len(s)-l+1)],lambda n,t,r,s:(lambda T,R:sum([g in R and(R.remove(g)or 1)for g in T])/len(T)if len(T+R)else 1)([.join(x)for x in n(t,s)],[.join(x)for x in n(r,s)]),print(Enter translation)or input().strip().lower().split(),print(Enter references)or input().strip().lower().split()))
  
subject: Add bleu-score calculator