C11111211113313112113313331333133313331312111113121111331333223313232232321121   >>    C1111121111331311211331333133313331333131211111312111133133322331323223232112   <<    C11111211113313112113313331333133313331312111113121111331333223313232232321123   >>      C11111211113313112113313331333133313331312111113121111331333223313232232321122   >>