text: l = [1,3,6,88,90]
  maxdif=-1
  maxdifp =-1
  
  for i in range(len(l)-1):
      dif = l[i+1]-l[i]
      if dif <0:
          dif = -dif
      if dif>maxdif:
          maxdif = dif
          maxdifp =i
  
  print(l[maxdifp], l[maxdifp+1])