When listing document page numbers, it is common to use "-" for the first and last page numbers instead of all pages for at least 3 consecutive pages. Given page numbers needed to list, use the "-" sign to shorten the list

Input

• The first line is N, 1 ≤ N ≤ ~10^{3}~ , the page number listed.The next line contains N integers, representing page numbers. The numbers are all unique.

• The first line is N, 1 ≤ N ≤ ~10^{3}~ , the page number listed.

• The next line contains N integers, representing page numbers. The numbers are all unique.

Output

• Print out a list of pages in order from smallest to largest.

Sample Input:

6
180 141 174 143 142 175

Sample Output:

141-143 174 175 180