diff --git a/src/ballot.rs b/src/ballot.rs
index 4959cbe..dd20eda 100644
--- a/src/ballot.rs
+++ b/src/ballot.rs
@@ -1,5 +1,4 @@
 use itertools::Itertools;
-
 use crate::header::Header;
 
 #[derive(Copy,Clone,Debug,PartialEq)]
@@ -72,7 +71,10 @@ impl Ballot {
 				let mut votes = Vec::<usize>::new();
 				
 				for party_id in self.votes {
+					let start = votes.len();
 					votes.extend(header.parties[party_id].member_ids.iter().copied());
+					let votes_end = &mut votes[start..];
+					votes_end.rotate_left(self.paper_id % votes_end.len());
 				}
 
 				Ballot {