C11111211113313112113313331333132313331322121111133313331333133311232212111   >>    C1111121111331311211331333133313231333132212111113331333133313331123221211   <<    C11111211113313112113313331333132313331322121111133313331333133311232212113   >>      C11111211113313112113313331333132313331322121111133313331333133311232212112   >>