C11111211113313112113313331333132313331322121111133313331333133311232322321231   >>    C1111121111331311211331333133313231333132212111113331333133313331123232232123   <<    C11111211113313112113313331333132313331322121111133313331333133311232322321233   >>      C11111211113313112113313331333132313331322121111133313331333133311232322321232   >>