C11111211113313112113313331333132313331322121111133313331333133311232213111   >>    C1111121111331311211331333133313231333132212111113331333133313331123221311   <<    C11111211113313112113313331333132313331322121111133313331333133311232213113   >>      C11111211113313112113313331333132313331322121111133313331333133311232213112   >>