C1111233131211111211113313331333133313331322331333131211113313331312321   >>    C111123313121111121111331333133313331333132233133313121111331333131232   <<    C1111233131211111211113313331333133313331322331333131211113313331312323   >>      C1111233131211111211113313331333133313331322331333131211113313331312322   >>