C1111233131211111211113313331333131133132233132313331333132321221   >>    C111123313121111121111331333133313113313223313231333133313232122   <<    C1111233131211111211113313331333131133132233132313331333132321223   >>      C1111233131211111211113313331333131133132233132313331333132321222   >>