C11111211113313112113313331333133313331333132313331333133313113313233311232231   >>    C1111121111331311211331333133313331333133313231333133313331311331323331123223   <<    C11111211113313112113313331333133313331333132313331333133313113313233311232233   >>      C11111211113313112113313331333133313331333132313331333133313113313233311232232   >>