C11111211113313112113313331333132313331322121111133313331333133311233132313121   >>    C1111121111331311211331333133313231333132212111113331333133313331123313231312   <<    C11111211113313112113313331333132313331322121111133313331333133311233132313123   >>      C11111211113313112113313331333132313331322121111133313331333133311233132313122   >>