CHALLENGE DESCRIPTION:

You are given a sorted list of numbers with duplicates. Print out the sorted list with duplicates removed.

INPUT SAMPLE:

File containing a list of sorted integers, comma delimited, one per line. E.g. 
1,1,1,2,2,3,3,4,4
2,3,4,5,5
OUTPUT SAMPLE:

Print out the sorted list with duplicates removed, one per line. 
E.g.

1,2,3,4
2,3,4,5